9.09% is the change from 286 to 312
Calculation steps:
[( 312 - 286 ) ÷ 286] x 100 = 9.09%
Formula
Percentage change = [(312 - 286) / 286] x 100
Subtract the new number by the original number
312 - 286 = 26
26 ÷ 286 = 0.09090909090909091
0.09090909090909091 x 100 = 9.09%