If the cost price (C.P.) of 6 articles is equal to the selling price (S.P.) of 4 articles find the gain percent.
6c = 4s
s= 3/2c
s/c = (3/2)c / c
= 3/2
= 150%
so the gain is 50%
s= 3/2c
s/c = (3/2)c / c
= 3/2
= 150%
so the gain is 50%