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To convert (a grade) out of (a potential) into (something) out of 100 multiply (a grade) by 100 and divide the result by(a potential)

So that 45 out of 50 = (45 x 100) ÷ 50 = 4500 ÷ 50 = 90%

or 21 out of 30 = (21 x 100) ÷ 30 = 2100 ÷ 30 = 70%

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14y ago

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