-91.07% is the change from 280 to 25
Calculation steps:
[( 25 - 280 ) ÷ 280] x 100 = -91.07%
Formula
Percentage change = [(25 - 280) / 280] x 100
Subtract the new number by the original number
25 - 280 = -255
-255 ÷ 280 = -0.9107142857142857
-0.9107142857142857 x 100 = -91.07%