-83.25% is the change from 597 to 100
Calculation steps:
[( 100 - 597 ) ÷ 597] x 100 = -83.25%
Formula
Percentage change = [(100 - 597) / 597] x 100
Subtract the new number by the original number
100 - 597 = -497
-497 ÷ 597 = -0.8324958123953099
-0.8324958123953099 x 100 = -83.25%