-82.3% is the change from 486 to 86
Calculation steps:
[( 86 - 486 ) ÷ 486] x 100 = -82.3%
Formula
Percentage change = [(86 - 486) / 486] x 100
Subtract the new number by the original number
86 - 486 = -400
-400 ÷ 486 = -0.823045267489712
-0.823045267489712 x 100 = -82.3%