98.39% is the change from 311 to 617
Calculation steps:
[( 617 - 311 ) ÷ 311] x 100 = 98.39%
Formula
Percentage change = [(617 - 311) / 311] x 100
Subtract the new number by the original number
617 - 311 = 306
306 ÷ 311 = 0.9839228295819936
0.9839228295819936 x 100 = 98.39%