30.97% is the change from 268 to 351
Calculation steps:
[( 351 - 268 ) ÷ 268] x 100 = 30.97%
Formula
Percentage change = [(351 - 268) / 268] x 100
Subtract the new number by the original number
351 - 268 = 83
83 ÷ 268 = 0.30970149253731344
0.30970149253731344 x 100 = 30.97%