50% is the change from 268 to 402
Calculation steps:
[( 402 - 268 ) ÷ 268] x 100 = 50%
Formula
Percentage change = [(402 - 268) / 268] x 100
Subtract the new number by the original number
402 - 268 = 134
134 ÷ 268 = 0.5
0.5 x 100 = 50%
Example