-72.1% is the change from 638 to 178
Calculation steps:
[( 178 - 638 ) ÷ 638] x 100 = -72.1%
Formula
Percentage change = [(178 - 638) / 638] x 100
Subtract the new number by the original number
178 - 638 = -460
-460 ÷ 638 = -0.7210031347962382
-0.7210031347962382 x 100 = -72.1%