the cost price of 10 articles is equal to the selling price of 9 article find the profit percentage
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If cost price of each article=x, then CP of 9 article=9x
and CP of 10 article=10x=SP of 9 article.
So profit %=(10x-9x)*100/9x
=100/9
and CP of 10 article=10x=SP of 9 article.
So profit %=(10x-9x)*100/9x
=100/9
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