Question

The
c.p of 15 books is equal to the s.p of 18 books. find his gain% or loss%?

Answer 1

c.p of 15 books = s.p of 18 books

c . p × 15 = s.p × 18

c .p / s.p = 18 / 15

c.p : s:p = 6 : 5

let the constant ratio = x
so now ,c .p = 6x

and s.p = 5x

loss% = ( c.p - s.p / c.p ) × 100%

( 6 x - 5x / 6x ) ×100= 1 x/6x× 100


= 1 /6 × 100 = 16.66 %