-70.22% is the change from 638 to 190
Calculation steps:
[( 190 - 638 ) ÷ 638] x 100 = -70.22%
Formula
Percentage change = [(190 - 638) / 638] x 100
Subtract the new number by the original number
190 - 638 = -448
-448 ÷ 638 = -0.7021943573667712
-0.7021943573667712 x 100 = -70.22%