-97.04% is the change from 710 to 21
Calculation steps:
[( 21 - 710 ) ÷ 710] x 100 = -97.04%
Formula
Percentage change = [(21 - 710) / 710] x 100
Subtract the new number by the original number
21 - 710 = -689
-689 ÷ 710 = -0.9704225352112676
-0.9704225352112676 x 100 = -97.04%