Question

Is there cost price of 21 copies of books are same as the selling price of 18 copies of the books then the gain percentage

Answer 1

Let the CP of each copies of books be ₹1 , Then
CP of 21 copies of books = ₹ 21
SP of 18 copies of books = CP of 21 copies of books = ₹21
Gain = SP - CP = ₹(21 - 18) = ₹ 3

Gain% = (gain/CP × 100)%
= 3/21 × 100
= 100/7
= 14 2/7 %

HOPE this helps u mate!!!

Answer 2

Answer:

answer will be 14 whole 2 upon 7