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Fractions and ratios

Explore fractions and ratios tools with formulas, input guidance and worked examples.

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Fractions and ratios (3)Integer arithmetic (3)Percentages (4)
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Fraction calculator

Add, subtract, multiply or divide two fractions and get an exact answer reduced to its simplest form.

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Math

Proportion calculator

Solve a proportion of the form a/b = c/x. Find the missing fourth term from three nonzero numbers.

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Math

Golden Ratio Calculator

How do I divide a length into two parts in the golden ratio? Enter the values below to calculate the result.

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