99.04% is the change from 311 to 619
Calculation steps:
[( 619 - 311 ) ÷ 311] x 100 = 99.04%
Formula
Percentage change = [(619 - 311) / 311] x 100
Subtract the new number by the original number
619 - 311 = 308
308 ÷ 311 = 0.9903536977491961
0.9903536977491961 x 100 = 99.04%