-85.78% is the change from 633 to 90
Calculation steps:
[( 90 - 633 ) ÷ 633] x 100 = -85.78%
Formula
Percentage change = [(90 - 633) / 633] x 100
Subtract the new number by the original number
90 - 633 = -543
-543 ÷ 633 = -0.8578199052132701
-0.8578199052132701 x 100 = -85.78%