50.88% is the change from 57 to 86
Calculation steps:
[( 86 - 57 ) ÷ 57] x 100 = 50.88%
Formula
Percentage change = [(86 - 57) / 57] x 100
Subtract the new number by the original number
86 - 57 = 29
29 ÷ 57 = 0.5087719298245614
0.5087719298245614 x 100 = 50.88%