-90.34% is the change from 290 to 28
Calculation steps:
[( 28 - 290 ) ÷ 290] x 100 = -90.34%
Formula
Percentage change = [(28 - 290) / 290] x 100
Subtract the new number by the original number
28 - 290 = -262
-262 ÷ 290 = -0.903448275862069
-0.903448275862069 x 100 = -90.34%