in 2017 , the company granted 440076 shares of restricted class a common stock and 7568 shares of restricted stock units .restricted common stock and restricted stock units generally have a vesting period of two to four years .the fair value related to these grants was $ 58.7 million , which is recognized as compensation expense on an accelerated basis over the vesting period .dividends are accrued on restricted class a common stock and restricted stock units and are paid once the restricted stock vests .in 2017 , the company also granted 203298 performance shares .the fair value related to these grants was $ 25.3 million , which is recognized as compensation expense on an accelerated and straight-lined basis over the vesting period .the vesting of these shares is contingent on meeting stated performance or market conditions .the following table summarizes restricted stock , restricted stock units , and performance shares activity for 2017 : number of shares weighted average grant date fair value .                                 | number of shares   | weightedaveragegrant datefair value
outstanding at december 31 2016 | 1820578            | $ 98                               
granted                         | 650942             | 129                                
vested                          | -510590 ( 510590 ) | 87                                 
cancelled                       | -401699 ( 401699 ) | 95                                 
outstanding at december 31 2017 | 1559231            | 116                                 the total fair value of restricted stock , restricted stock units , and performance shares that vested during 2017 , 2016 and 2015 was $ 66.0 million , $ 59.8 million and $ 43.3 million , respectively .under the espp , eligible employees may acquire shares of class a common stock using after-tax payroll deductions made during consecutive offering periods of approximately six months in duration .shares are purchased at the end of each offering period at a price of 90% ( 90 % ) of the closing price of the class a common stock as reported on the nasdaq global select market .compensation expense is recognized on the dates of purchase for the discount from the closing price .in 2017 , 2016 and 2015 , a total of 19936 , 19858 and 19756 shares , respectively , of class a common stock were issued to participating employees .these shares are subject to a six-month holding period .annual expense of $ 0.3 million for the purchase discount was recognized in 2017 , and $ 0.2 million was recognized in both 2016 and 2015 .non-executive directors receive an annual award of class a common stock with a value equal to $ 100000 .non-executive directors may also elect to receive some or all of the cash portion of their annual stipend , up to $ 60000 , in shares of stock based on the closing price at the date of distribution .as a result , 19736 shares , 26439 shares and 25853 shares of class a common stock were issued to non-executive directors during 2017 , 2016 and 2015 , respectively .these shares are not subject to any vesting restrictions .expense of $ 2.5 million , $ 2.4 million and $ 2.5 million related to these stock-based payments was recognized for the years ended december 31 , 2017 , 2016 and 2015 , respectively. .
Question: in 2017, what was the number of granted performance shares?
Steps: Ask for number 203298
Answer: 203298.0
Question: and what was the total number of granted shares?
Steps: Ask for number 650942
Answer: 650942.0
Question: what percentage, then, of this total did that performance shares number represent?

Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.
in 2017 , the company granted 440076 shares of restricted class a common stock and 7568 shares of restricted stock units .restricted common stock and restricted stock units generally have a vesting period of two to four years .the fair value related to these grants was $ 58.7 million , which is recognized as compensation expense on an accelerated basis over the vesting period .dividends are accrued on restricted class a common stock and restricted stock units and are paid once the restricted stock vests .in 2017 , the company also granted 203298 performance shares .the fair value related to these grants was $ 25.3 million , which is recognized as compensation expense on an accelerated and straight-lined basis over the vesting period .the vesting of these shares is contingent on meeting stated performance or market conditions .the following table summarizes restricted stock , restricted stock units , and performance shares activity for 2017 : number of shares weighted average grant date fair value .                                 | number of shares   | weightedaveragegrant datefair value
outstanding at december 31 2016 | 1820578            | $ 98                               
granted                         | 650942             | 129                                
vested                          | -510590 ( 510590 ) | 87                                 
cancelled                       | -401699 ( 401699 ) | 95                                 
outstanding at december 31 2017 | 1559231            | 116                                 the total fair value of restricted stock , restricted stock units , and performance shares that vested during 2017 , 2016 and 2015 was $ 66.0 million , $ 59.8 million and $ 43.3 million , respectively .under the espp , eligible employees may acquire shares of class a common stock using after-tax payroll deductions made during consecutive offering periods of approximately six months in duration .shares are purchased at the end of each offering period at a price of 90% ( 90 % ) of the closing price of the class a common stock as reported on the nasdaq global select market .compensation expense is recognized on the dates of purchase for the discount from the closing price .in 2017 , 2016 and 2015 , a total of 19936 , 19858 and 19756 shares , respectively , of class a common stock were issued to participating employees .these shares are subject to a six-month holding period .annual expense of $ 0.3 million for the purchase discount was recognized in 2017 , and $ 0.2 million was recognized in both 2016 and 2015 .non-executive directors receive an annual award of class a common stock with a value equal to $ 100000 .non-executive directors may also elect to receive some or all of the cash portion of their annual stipend , up to $ 60000 , in shares of stock based on the closing price at the date of distribution .as a result , 19736 shares , 26439 shares and 25853 shares of class a common stock were issued to non-executive directors during 2017 , 2016 and 2015 , respectively .these shares are not subject to any vesting restrictions .expense of $ 2.5 million , $ 2.4 million and $ 2.5 million related to these stock-based payments was recognized for the years ended december 31 , 2017 , 2016 and 2015 , respectively. .
Question: in 2017, what was the number of granted performance shares?
Steps: Ask for number 203298
Answer: 203298.0
Question: and what was the total number of granted shares?
Steps: Ask for number 650942
Answer: 650942.0
Question: what percentage, then, of this total did that performance shares number represent?
