199.36% is the change from 311 to 931
Calculation steps:
[( 931 - 311 ) ÷ 311] x 100 = 199.36%
Formula
Percentage change = [(931 - 311) / 311] x 100
Subtract the new number by the original number
931 - 311 = 620
620 ÷ 311 = 1.9935691318327975
1.9935691318327975 x 100 = 199.36%