Calchy.
Math - percentage change

What is the percentage change from 400 to 350?

Answer
-12.50
%
((350 − 400) ÷ 400) × 100 = -12.50%
How we got there
  1. 01Difference: 350 − 400 = -50.00
  2. 02Divide by start: -50.00 ÷ 400 = -0.1250
  3. 03Convert to %: × 100 = -12.50% (decrease)
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