42.39% is the change from 611 to 870
Calculation steps:
[( 870 - 611 ) ÷ 611] x 100 = 42.39%
Formula
Percentage change = [(870 - 611) / 611] x 100
Subtract the new number by the original number
870 - 611 = 259
259 ÷ 611 = 0.4238952536824877
0.4238952536824877 x 100 = 42.39%