8.1% is the change from 815 to 881
Calculation steps:
[( 881 - 815 ) ÷ 815] x 100 = 8.1%
Formula
Percentage change = [(881 - 815) / 815] x 100
Subtract the new number by the original number
881 - 815 = 66
66 ÷ 815 = 0.08098159509202454
0.08098159509202454 x 100 = 8.1%