102.8% is the change from 429 to 870
Calculation steps:
[( 870 - 429 ) ÷ 429] x 100 = 102.8%
Formula
Percentage change = [(870 - 429) / 429] x 100
Subtract the new number by the original number
870 - 429 = 441
441 ÷ 429 = 1.027972027972028
1.027972027972028 x 100 = 102.8%