-83.89% is the change from 633 to 102
Calculation steps:
[( 102 - 633 ) ÷ 633] x 100 = -83.89%
Formula
Percentage change = [(102 - 633) / 633] x 100
Subtract the new number by the original number
102 - 633 = -531
-531 ÷ 633 = -0.8388625592417062
-0.8388625592417062 x 100 = -83.89%