85.47% is the change from 172 to 319
Calculation steps:
[( 319 - 172 ) ÷ 172] x 100 = 85.47%
Formula
Percentage change = [(319 - 172) / 172] x 100
Subtract the new number by the original number
319 - 172 = 147
147 ÷ 172 = 0.8546511627906976
0.8546511627906976 x 100 = 85.47%