19.28% is the change from 830 to 990
Calculation steps:
[( 990 - 830 ) ÷ 830] x 100 = 19.28%
Formula
Percentage change = [(990 - 830) / 830] x 100
Subtract the new number by the original number
990 - 830 = 160
160 ÷ 830 = 0.1927710843373494
0.1927710843373494 x 100 = 19.28%