-91.72% is the change from 290 to 24
Calculation steps:
[( 24 - 290 ) ÷ 290] x 100 = -91.72%
Formula
Percentage change = [(24 - 290) / 290] x 100
Subtract the new number by the original number
24 - 290 = -266
-266 ÷ 290 = -0.9172413793103448
-0.9172413793103448 x 100 = -91.72%