-84.69% is the change from 542 to 83
Calculation steps:
[( 83 - 542 ) ÷ 542] x 100 = -84.69%
Formula
Percentage change = [(83 - 542) / 542] x 100
Subtract the new number by the original number
83 - 542 = -459
-459 ÷ 542 = -0.8468634686346863
-0.8468634686346863 x 100 = -84.69%