3.49% is the change from 86 to 89
Calculation steps:
[( 89 - 86 ) ÷ 86] x 100 = 3.49%
Formula
Percentage change = [(89 - 86) / 86] x 100
Subtract the new number by the original number
89 - 86 = 3
3 ÷ 86 = 0.03488372093023256
0.03488372093023256 x 100 = 3.49%