-97.59% is the change from 290 to 7
Calculation steps:
[( 7 - 290 ) ÷ 290] x 100 = -97.59%
Formula
Percentage change = [(7 - 290) / 290] x 100
Subtract the new number by the original number
7 - 290 = -283
-283 ÷ 290 = -0.9758620689655172
-0.9758620689655172 x 100 = -97.59%