6.99% is the change from 815 to 872
Calculation steps:
[( 872 - 815 ) ÷ 815] x 100 = 6.99%
Formula
Percentage change = [(872 - 815) / 815] x 100
Subtract the new number by the original number
872 - 815 = 57
57 ÷ 815 = 0.06993865030674846
0.06993865030674846 x 100 = 6.99%