-97.23% is the change from 721 to 20
Calculation steps:
[( 20 - 721 ) ÷ 721] x 100 = -97.23%
Formula
Percentage change = [(20 - 721) / 721] x 100
Subtract the new number by the original number
20 - 721 = -701
-701 ÷ 721 = -0.9722607489597781
-0.9722607489597781 x 100 = -97.23%