-78.2% is the change from 633 to 138
Calculation steps:
[( 138 - 633 ) ÷ 633] x 100 = -78.2%
Formula
Percentage change = [(138 - 633) / 633] x 100
Subtract the new number by the original number
138 - 633 = -495
-495 ÷ 633 = -0.7819905213270142
-0.7819905213270142 x 100 = -78.2%