-81.82% is the change from 638 to 116
Calculation steps:
[( 116 - 638 ) ÷ 638] x 100 = -81.82%
Formula
Percentage change = [(116 - 638) / 638] x 100
Subtract the new number by the original number
116 - 638 = -522
-522 ÷ 638 = -0.8181818181818182
-0.8181818181818182 x 100 = -81.82%