-84.34% is the change from 549 to 86
Calculation steps:
[( 86 - 549 ) ÷ 549] x 100 = -84.34%
Formula
Percentage change = [(86 - 549) / 549] x 100
Subtract the new number by the original number
86 - 549 = -463
-463 ÷ 549 = -0.843351548269581
-0.843351548269581 x 100 = -84.34%