36% is the change from 50 to 68
Calculation steps:
[( 68 - 50 ) ÷ 50] x 100 = 36%
Formula
Percentage change = [(68 - 50) / 50] x 100
Subtract the new number by the original number
68 - 50 = 18
18 ÷ 50 = 0.36
0.36 x 100 = 36%
Example