22.9% is the change from 310 to 381
Calculation steps:
[( 381 - 310 ) ÷ 310] x 100 = 22.9%
Formula
Percentage change = [(381 - 310) / 310] x 100
Subtract the new number by the original number
381 - 310 = 71
71 ÷ 310 = 0.22903225806451613
0.22903225806451613 x 100 = 22.9%