Percentage change from 15 to 9

Instant answer with step-by-step formula

Percentage change from 15 to 9 = 40% decrease
((9 − 15) ÷ 15) × 100 = -40% (decrease)

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Step-by-step explanation

  1. Write the formula: ((New − Old) ÷ Old) × 100
  2. Subtract: 9 − 15 = -6
  3. Divide by old value: -6 ÷ 15 = -0.4
  4. Multiply by 100: -40% (decrease)

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