Percent Change:

60 %

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How to calculate percent change between 400 and 640

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

  1. Subtract (640 - 400) which gives you: 240
  2. Divide 240 / 400 which gives you: 0.6000000000
  3. Multiply 0.6000000000 * 100 = 60