-89.68% is the change from 591 to 61
Calculation steps:
[( 61 - 591 ) ÷ 591] x 100 = -89.68%
Formula
Percentage change = [(61 - 591) / 591] x 100
Subtract the new number by the original number
61 - 591 = -530
-530 ÷ 591 = -0.8967851099830795
-0.8967851099830795 x 100 = -89.68%