-97.18% is the change from 710 to 20
Calculation steps:
[( 20 - 710 ) ÷ 710] x 100 = -97.18%
Formula
Percentage change = [(20 - 710) / 710] x 100
Subtract the new number by the original number
20 - 710 = -690
-690 ÷ 710 = -0.971830985915493
-0.971830985915493 x 100 = -97.18%