-96.55% is the change from 290 to 10
Calculation steps:
[( 10 - 290 ) ÷ 290] x 100 = -96.55%
Formula
Percentage change = [(10 - 290) / 290] x 100
Subtract the new number by the original number
10 - 290 = -280
-280 ÷ 290 = -0.9655172413793104
-0.9655172413793104 x 100 = -96.55%