4.83% is the change from 870 to 912
Calculation steps:
[( 912 - 870 ) ÷ 870] x 100 = 4.83%
Formula
Percentage change = [(912 - 870) / 870] x 100
Subtract the new number by the original number
912 - 870 = 42
42 ÷ 870 = 0.04827586206896552
0.04827586206896552 x 100 = 4.83%