Question

If the cost of 8 pens is same as the selling price of 6 pens then the gain percent is a) 33% b) 11½% c) 13⅓%

Answer 1

cp of one pen=x/8
sp of one pen=x/6

profit℅=(x/6 - x/8)/(x/8) ×100
=1/3×100
=33(1/3) ℅

Answer 2

let cp of each pen is ₹1
sp of 6pens = cp of 8 pens
gain %is sp - cp =8 - 6 = ₹2
gain% =gain/cp ×100 %
2 /6 ×100 % =33 %
hence gain % is 33%