Percent Change:

-91 %

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How to calculate percent change between 100 and 9

Using the formula for percentage change, and following the order of operations

  1. Subtract (9 - 100) which gives you: -91
  2. Divide -91 / 100 which gives you: -0.9100000000
  3. Multiply -0.9100000000 * 100 = -91