-21.57% is the change from 357 to 280
Calculation steps:
[( 280 - 357 ) ÷ 357] x 100 = -21.57%
Formula
Percentage change = [(280 - 357) / 357] x 100
Subtract the new number by the original number
280 - 357 = -77
-77 ÷ 357 = -0.21568627450980393
-0.21568627450980393 x 100 = -21.57%