-86.89% is the change from 633 to 83
Calculation steps:
[( 83 - 633 ) ÷ 633] x 100 = -86.89%
Formula
Percentage change = [(83 - 633) / 633] x 100
Subtract the new number by the original number
83 - 633 = -550
-550 ÷ 633 = -0.8688783570300158
-0.8688783570300158 x 100 = -86.89%