You have to divide the number of questions you answered correctly of the number of total questions then multiply by 100. (#correct over total#of questions) x 100
Or, you divided 100 by the total number of questions, then multiply by the number you got right to find your percentage.
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if you have a fraction, like in a grade say you got 72/85 you would divide 72 by 85 and get 84%.
To find the half of a fraction, multiply the given fraction by 1/2 or 0.5.
Remember that in math, "of" usually means "times". To find a fraction of a fraction, multiply them.
You turn the decimal into a fraction. Then you can find the equivalent fraction.
To simplify a fraction, find the GCF of the numerator and denominator and divide them by it. If the GCF is 1, the fraction is in its simplest form.