-83.39% is the change from 548 to 91
Calculation steps:
[( 91 - 548 ) ÷ 548] x 100 = -83.39%
Formula
Percentage change = [(91 - 548) / 548] x 100
Subtract the new number by the original number
91 - 548 = -457
-457 ÷ 548 = -0.833941605839416
-0.833941605839416 x 100 = -83.39%