83.04% is the change from 171 to 313
Calculation steps:
[( 313 - 171 ) ÷ 171] x 100 = 83.04%
Formula
Percentage change = [(313 - 171) / 171] x 100
Subtract the new number by the original number
313 - 171 = 142
142 ÷ 171 = 0.8304093567251462
0.8304093567251462 x 100 = 83.04%