97.11% is the change from 311 to 613
Calculation steps:
[( 613 - 311 ) ÷ 311] x 100 = 97.11%
Formula
Percentage change = [(613 - 311) / 311] x 100
Subtract the new number by the original number
613 - 311 = 302
302 ÷ 311 = 0.9710610932475884
0.9710610932475884 x 100 = 97.11%