72% is the change from 50 to 86
Calculation steps:
[( 86 - 50 ) ÷ 50] x 100 = 72%
Formula
Percentage change = [(86 - 50) / 50] x 100
Subtract the new number by the original number
86 - 50 = 36
36 ÷ 50 = 0.72
0.72 x 100 = 72%
Example