50.7% is the change from 426 to 642
Calculation steps:
[( 642 - 426 ) ÷ 426] x 100 = 50.7%
Formula
Percentage change = [(642 - 426) / 426] x 100
Subtract the new number by the original number
642 - 426 = 216
216 ÷ 426 = 0.5070422535211268
0.5070422535211268 x 100 = 50.7%