9.78% is the change from 910 to 999
Calculation steps:
[( 999 - 910 ) ÷ 910] x 100 = 9.78%
Formula
Percentage change = [(999 - 910) / 910] x 100
Subtract the new number by the original number
999 - 910 = 89
89 ÷ 910 = 0.0978021978021978
0.0978021978021978 x 100 = 9.78%