8.51% is the change from 870 to 944
Calculation steps:
[( 944 - 870 ) ÷ 870] x 100 = 8.51%
Formula
Percentage change = [(944 - 870) / 870] x 100
Subtract the new number by the original number
944 - 870 = 74
74 ÷ 870 = 0.08505747126436781
0.08505747126436781 x 100 = 8.51%