-84.13% is the change from 542 to 86
Calculation steps:
[( 86 - 542 ) ÷ 542] x 100 = -84.13%
Formula
Percentage change = [(86 - 542) / 542] x 100
Subtract the new number by the original number
86 - 542 = -456
-456 ÷ 542 = -0.8413284132841329
-0.8413284132841329 x 100 = -84.13%