8.51% is the change from 811 to 880
Calculation steps:
[( 880 - 811 ) ÷ 811] x 100 = 8.51%
Formula
Percentage change = [(880 - 811) / 811] x 100
Subtract the new number by the original number
880 - 811 = 69
69 ÷ 811 = 0.08508014796547472
0.08508014796547472 x 100 = 8.51%