319.7% is the change from 198 to 831
Calculation steps:
[( 831 - 198 ) ÷ 198] x 100 = 319.7%
Formula
Percentage change = [(831 - 198) / 198] x 100
Subtract the new number by the original number
831 - 198 = 633
633 ÷ 198 = 3.196969696969697
3.196969696969697 x 100 = 319.7%