-77.9% is the change from 638 to 141
Calculation steps:
[( 141 - 638 ) ÷ 638] x 100 = -77.9%
Formula
Percentage change = [(141 - 638) / 638] x 100
Subtract the new number by the original number
141 - 638 = -497
-497 ÷ 638 = -0.7789968652037618
-0.7789968652037618 x 100 = -77.9%