4.94% is the change from 81 to 85
Calculation steps:
[( 85 - 81 ) ÷ 81] x 100 = 4.94%
Formula
Percentage change = [(85 - 81) / 81] x 100
Subtract the new number by the original number
85 - 81 = 4
4 ÷ 81 = 0.04938271604938271
0.04938271604938271 x 100 = 4.94%