-96.62% is the change from 591 to 20
Calculation steps:
[( 20 - 591 ) ÷ 591] x 100 = -96.62%
Formula
Percentage change = [(20 - 591) / 591] x 100
Subtract the new number by the original number
20 - 591 = -571
-571 ÷ 591 = -0.9661590524534687
-0.9661590524534687 x 100 = -96.62%