50.88% is the change from 171 to 258
Calculation steps:
[( 258 - 171 ) ÷ 171] x 100 = 50.88%
Formula
Percentage change = [(258 - 171) / 171] x 100
Subtract the new number by the original number
258 - 171 = 87
87 ÷ 171 = 0.5087719298245614
0.5087719298245614 x 100 = 50.88%