83.14% is the change from 172 to 315
Calculation steps:
[( 315 - 172 ) ÷ 172] x 100 = 83.14%
Formula
Percentage change = [(315 - 172) / 172] x 100
Subtract the new number by the original number
315 - 172 = 143
143 ÷ 172 = 0.8313953488372093
0.8313953488372093 x 100 = 83.14%