-68.34% is the change from 638 to 202
Calculation steps:
[( 202 - 638 ) ÷ 638] x 100 = -68.34%
Formula
Percentage change = [(202 - 638) / 638] x 100
Subtract the new number by the original number
202 - 638 = -436
-436 ÷ 638 = -0.6833855799373041
-0.6833855799373041 x 100 = -68.34%