-84.5% is the change from 555 to 86
Calculation steps:
[( 86 - 555 ) ÷ 555] x 100 = -84.5%
Formula
Percentage change = [(86 - 555) / 555] x 100
Subtract the new number by the original number
86 - 555 = -469
-469 ÷ 555 = -0.8450450450450451
-0.8450450450450451 x 100 = -84.5%