-72.86% is the change from 280 to 76
Calculation steps:
[( 76 - 280 ) ÷ 280] x 100 = -72.86%
Formula
Percentage change = [(76 - 280) / 280] x 100
Subtract the new number by the original number
76 - 280 = -204
-204 ÷ 280 = -0.7285714285714285
-0.7285714285714285 x 100 = -72.86%