-79.89% is the change from 542 to 109
Calculation steps:
[( 109 - 542 ) ÷ 542] x 100 = -79.89%
Formula
Percentage change = [(109 - 542) / 542] x 100
Subtract the new number by the original number
109 - 542 = -433
-433 ÷ 542 = -0.7988929889298892
-0.7988929889298892 x 100 = -79.89%