-76.49% is the change from 638 to 150
Calculation steps:
[( 150 - 638 ) ÷ 638] x 100 = -76.49%
Formula
Percentage change = [(150 - 638) / 638] x 100
Subtract the new number by the original number
150 - 638 = -488
-488 ÷ 638 = -0.7648902821316614
-0.7648902821316614 x 100 = -76.49%