70.18% is the change from 171 to 291
Calculation steps:
[( 291 - 171 ) ÷ 171] x 100 = 70.18%
Formula
Percentage change = [(291 - 171) / 171] x 100
Subtract the new number by the original number
291 - 171 = 120
120 ÷ 171 = 0.7017543859649122
0.7017543859649122 x 100 = 70.18%