52.63% is the change from 171 to 261
Calculation steps:
[( 261 - 171 ) ÷ 171] x 100 = 52.63%
Formula
Percentage change = [(261 - 171) / 171] x 100
Subtract the new number by the original number
261 - 171 = 90
90 ÷ 171 = 0.5263157894736842
0.5263157894736842 x 100 = 52.63%