-89.93% is the change from 278 to 28
Calculation steps:
[( 28 - 278 ) ÷ 278] x 100 = -89.93%
Formula
Percentage change = [(28 - 278) / 278] x 100
Subtract the new number by the original number
28 - 278 = -250
-250 ÷ 278 = -0.8992805755395683
-0.8992805755395683 x 100 = -89.93%