-72.14% is the change from 280 to 78
Calculation steps:
[( 78 - 280 ) ÷ 280] x 100 = -72.14%
Formula
Percentage change = [(78 - 280) / 280] x 100
Subtract the new number by the original number
78 - 280 = -202
-202 ÷ 280 = -0.7214285714285714
-0.7214285714285714 x 100 = -72.14%