86.4% is the change from 331 to 617
Calculation steps:
[( 617 - 331 ) ÷ 331] x 100 = 86.4%
Formula
Percentage change = [(617 - 331) / 331] x 100
Subtract the new number by the original number
617 - 331 = 286
286 ÷ 331 = 0.8640483383685801
0.8640483383685801 x 100 = 86.4%