-83.72% is the change from 559 to 91
Calculation steps:
[( 91 - 559 ) ÷ 559] x 100 = -83.72%
Formula
Percentage change = [(91 - 559) / 559] x 100
Subtract the new number by the original number
91 - 559 = -468
-468 ÷ 559 = -0.8372093023255814
-0.8372093023255814 x 100 = -83.72%