3.31% is the change from 302 to 312
Calculation steps:
[( 312 - 302 ) ÷ 302] x 100 = 3.31%
Formula
Percentage change = [(312 - 302) / 302] x 100
Subtract the new number by the original number
312 - 302 = 10
10 ÷ 302 = 0.033112582781456956
0.033112582781456956 x 100 = 3.31%