10.58% is the change from 312 to 345
Calculation steps:
[( 345 - 312 ) ÷ 312] x 100 = 10.58%
Formula
Percentage change = [(345 - 312) / 312] x 100
Subtract the new number by the original number
345 - 312 = 33
33 ÷ 312 = 0.10576923076923077
0.10576923076923077 x 100 = 10.58%