-84.52% is the change from 588 to 91
Calculation steps:
[( 91 - 588 ) ÷ 588] x 100 = -84.52%
Formula
Percentage change = [(91 - 588) / 588] x 100
Subtract the new number by the original number
91 - 588 = -497
-497 ÷ 588 = -0.8452380952380952
-0.8452380952380952 x 100 = -84.52%