Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is?	Choices:
A) 15	B) 16	C) 18	D) 25	E) 20
Explanation:   Ratio of times taken by Sakshi and Tanys = 125:100 = 5:4   Suppose Tanya takes x days to do the work.   5:4 :: 20:x =&gt; x= 16 days.   Hence, Tanya takes 16 days to complete the work.   ANSWER IS 16
<result>B</result>
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is?