-84.32% is the change from 542 to 85
Calculation steps:
[( 85 - 542 ) ÷ 542] x 100 = -84.32%
Formula
Percentage change = [(85 - 542) / 542] x 100
Subtract the new number by the original number
85 - 542 = -457
-457 ÷ 542 = -0.8431734317343174
-0.8431734317343174 x 100 = -84.32%