28% is the change from 50 to 64
Calculation steps:
[( 64 - 50 ) ÷ 50] x 100 = 28%
Formula
Percentage change = [(64 - 50) / 50] x 100
Subtract the new number by the original number
64 - 50 = 14
14 ÷ 50 = 0.28
0.28 x 100 = 28%
Example