9.5% is the change from 821 to 899
Calculation steps:
[( 899 - 821 ) ÷ 821] x 100 = 9.5%
Formula
Percentage change = [(899 - 821) / 821] x 100
Subtract the new number by the original number
899 - 821 = 78
78 ÷ 821 = 0.09500609013398295
0.09500609013398295 x 100 = 9.5%