-83.99% is the change from 537 to 86
Calculation steps:
[( 86 - 537 ) ÷ 537] x 100 = -83.99%
Formula
Percentage change = [(86 - 537) / 537] x 100
Subtract the new number by the original number
86 - 537 = -451
-451 ÷ 537 = -0.839851024208566
-0.839851024208566 x 100 = -83.99%