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To convert a fraction into percentage, multiply with 100.

 \frac{4}{10}*100=40 %
When you want to change any fraction into percentage....First of all you have to keep in mind that Percentage means in 100.

So we have to Convert 4/10 into %.
First Write 4/10 then put a multiply sign after the given fraction and then write 100.
So the following will be form..=======

4/10 x 100 = 40%
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