-49.7% is the change from 825 to 415
Calculation steps:
[( 415 - 825 ) ÷ 825] x 100 = -49.7%
Formula
Percentage change = [(415 - 825) / 825] x 100
Subtract the new number by the original number
415 - 825 = -410
-410 ÷ 825 = -0.49696969696969695
-0.49696969696969695 x 100 = -49.7%