Question
What percent above the cost price of an item should a shopkeeper mark his goods so that after allowing a discount of 30%, he still gains 10%?
Answers
40%
If he marks up r%, then
(1+r)c*.70 = 1.1c
1+r = 1.1/.7
r = 1.1/.7-1 = 0.57 = 57% or 4/7
Check:
cost = 14
1.57*14 = 22
22*.7 = 15.4 = 14 * 1.10
(1+r)c*.70 = 1.1c
1+r = 1.1/.7
r = 1.1/.7-1 = 0.57 = 57% or 4/7
Check:
cost = 14
1.57*14 = 22
22*.7 = 15.4 = 14 * 1.10
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