0.85% is the change from 823 to 830
Calculation steps:
[( 830 - 823 ) ÷ 823] x 100 = 0.85%
Formula
Percentage change = [(830 - 823) / 823] x 100
Subtract the new number by the original number
830 - 823 = 7
7 ÷ 823 = 0.00850546780072904
0.00850546780072904 x 100 = 0.85%