12.18% is the change from 312 to 350
Calculation steps:
[( 350 - 312 ) ÷ 312] x 100 = 12.18%
Formula
Percentage change = [(350 - 312) / 312] x 100
Subtract the new number by the original number
350 - 312 = 38
38 ÷ 312 = 0.12179487179487179
0.12179487179487179 x 100 = 12.18%