80.35% is the change from 173 to 312
Calculation steps:
[( 312 - 173 ) ÷ 173] x 100 = 80.35%
Formula
Percentage change = [(312 - 173) / 173] x 100
Subtract the new number by the original number
312 - 173 = 139
139 ÷ 173 = 0.8034682080924855
0.8034682080924855 x 100 = 80.35%