-96.5% is the change from 571 to 20
Calculation steps:
[( 20 - 571 ) ÷ 571] x 100 = -96.5%
Formula
Percentage change = [(20 - 571) / 571] x 100
Subtract the new number by the original number
20 - 571 = -551
-551 ÷ 571 = -0.9649737302977233
-0.9649737302977233 x 100 = -96.5%