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Percentages

Per cent means per hundred; every percentage problem is a fraction over 100.

“15% of 80” means 15 hundredths of 80: multiply by 15/100. The same idea handles increases (multiply by 1.15) and decreases (multiply by 0.85), and reverse questions (“80 is 15% of what?”) become a one-line equation.

Exemple de travail: what is 15% of 80

Arithmetic · Arithmetic

Evaluate 12

12

Étape par étape

  1. 15 \cdot \frac{1}{100} \cdot 80 = 12

    Evaluate.

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12

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