-38.57% is the change from 280 to 172
Calculation steps:
[( 172 - 280 ) ÷ 280] x 100 = -38.57%
Formula
Percentage change = [(172 - 280) / 280] x 100
Subtract the new number by the original number
172 - 280 = -108
-108 ÷ 280 = -0.38571428571428573
-0.38571428571428573 x 100 = -38.57%