The cost of 100 articles is equal to selling price of 90. Find the gain or loss percent?
Select.
A) 11%
B) 20%
C) 27%
D) 32%
E) 49%
C.P. of each article be $1   C.P. of 90 articles = 100   gain% = 10/90*100 = 11% approximately   11%nswer is 11%
<result>A</result>
The cost of 100 articles is equal to selling price of 90. Find the gain or loss percent?