the cp of 21 articles is equal to the sp of 18 articles. the gain per cent is ?
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Friend we have a easy method to solve it
Actually the first step is
Sp-cp=18-21=-3----gain or loss
Therfore there is 3 loss
Second step
Now comes your formula
Gain or loss ÷cp×100
3 loss÷21×100
100÷7 =14.2%
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