Question

how to calculate percentage marks is 30​

Answer 1

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If marks is 30 out of 100, them

% = 30/100 * 100 = 30%

If marks is 30 out of 80, then

% = 30/80*100 = 37/5 %

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Answer 2

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To calculate the percentage marks :-

$\frac{30}{100}$ × 100 %

= 30 %