After getting 2 successive discounts, a shirt with a list price of Rs 150 is available at Rs 105. If the second discount is 12.55,find the first discount.
Choose the correct choice from the following answers
A) 22%
B) 18%
C) 24%
D) 17%
E) 20%
Let the first discount be x%   Then,87.5% of (100-x)% of 150= 105   =	87.5/100*(100-x)/100*450=150=&gt;105=&gt;100-x=(105*100*100)/(150*87.5)= 
<gadget id="calculator">(105*100*100)/(150*87.5)</gadget>
<output>80</output>
80   x=(100-80)= 
<gadget id="calculator">(100-80)</gadget>
<output>20</output>
20   first discount= 20%   Answer is 20%.
<result>E</result>
After getting 2 successive discounts, a shirt with a list price of Rs 150 is available at Rs 105. If the second discount is 12.55,find the first discount.