Percentages: The most useful statistics ever invented

Fractions and proportions are also parts of wholes, but both take on values between 0 (none of the whole) and 1 (all of the whole), rather than between 0 and 100. To convert from a fraction or a proportion to a percentage you multiply by 100 and add a % sign. To convert from a percentage to a proportion you delete the % sign and divide by 100. ................
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