-3.49% is the change from 86 to 83
Calculation steps:
[( 83 - 86 ) ÷ 86] x 100 = -3.49%
Formula
Percentage change = [(83 - 86) / 86] x 100
Subtract the new number by the original number
83 - 86 = -3
-3 ÷ 86 = -0.03488372093023256
-0.03488372093023256 x 100 = -3.49%