51.49% is the change from 268 to 406
Calculation steps:
[( 406 - 268 ) ÷ 268] x 100 = 51.49%
Formula
Percentage change = [(406 - 268) / 268] x 100
Subtract the new number by the original number
406 - 268 = 138
138 ÷ 268 = 0.5149253731343284
0.5149253731343284 x 100 = 51.49%