-69.28% is the change from 638 to 196
Calculation steps:
[( 196 - 638 ) ÷ 638] x 100 = -69.28%
Formula
Percentage change = [(196 - 638) / 638] x 100
Subtract the new number by the original number
196 - 638 = -442
-442 ÷ 638 = -0.6927899686520376
-0.6927899686520376 x 100 = -69.28%