-75.86% is the change from 638 to 154
Calculation steps:
[( 154 - 638 ) ÷ 638] x 100 = -75.86%
Formula
Percentage change = [(154 - 638) / 638] x 100
Subtract the new number by the original number
154 - 638 = -484
-484 ÷ 638 = -0.7586206896551724
-0.7586206896551724 x 100 = -75.86%