82.35% is the change from 17 to 31
Calculation steps:
[( 31 - 17 ) ÷ 17] x 100 = 82.35%
Formula
Percentage change = [(31 - 17) / 17] x 100
Subtract the new number by the original number
31 - 17 = 14
14 ÷ 17 = 0.8235294117647058
0.8235294117647058 x 100 = 82.35%