-89.78% is the change from 597 to 61
Calculation steps:
[( 61 - 597 ) ÷ 597] x 100 = -89.78%
Formula
Percentage change = [(61 - 597) / 597] x 100
Subtract the new number by the original number
61 - 597 = -536
-536 ÷ 597 = -0.897822445561139
-0.897822445561139 x 100 = -89.78%