-83.18% is the change from 541 to 91
Calculation steps:
[( 91 - 541 ) ÷ 541] x 100 = -83.18%
Formula
Percentage change = [(91 - 541) / 541] x 100
Subtract the new number by the original number
91 - 541 = -450
-450 ÷ 541 = -0.8317929759704251
-0.8317929759704251 x 100 = -83.18%