-81.7% is the change from 541 to 99
Calculation steps:
[( 99 - 541 ) ÷ 541] x 100 = -81.7%
Formula
Percentage change = [(99 - 541) / 541] x 100
Subtract the new number by the original number
99 - 541 = -442
-442 ÷ 541 = -0.8170055452865065
-0.8170055452865065 x 100 = -81.7%