9.08% is the change from 870 to 949
Calculation steps:
[( 949 - 870 ) ÷ 870] x 100 = 9.08%
Formula
Percentage change = [(949 - 870) / 870] x 100
Subtract the new number by the original number
949 - 870 = 79
79 ÷ 870 = 0.09080459770114943
0.09080459770114943 x 100 = 9.08%