6.9% is the change from 870 to 930
Calculation steps:
[( 930 - 870 ) ÷ 870] x 100 = 6.9%
Formula
Percentage change = [(930 - 870) / 870] x 100
Subtract the new number by the original number
930 - 870 = 60
60 ÷ 870 = 0.06896551724137931
0.06896551724137931 x 100 = 6.9%