6.63% is the change from 830 to 885
Calculation steps:
[( 885 - 830 ) ÷ 830] x 100 = 6.63%
Formula
Percentage change = [(885 - 830) / 830] x 100
Subtract the new number by the original number
885 - 830 = 55
55 ÷ 830 = 0.06626506024096386
0.06626506024096386 x 100 = 6.63%