56.34% is the change from 426 to 666
Calculation steps:
[( 666 - 426 ) ÷ 426] x 100 = 56.34%
Formula
Percentage change = [(666 - 426) / 426] x 100
Subtract the new number by the original number
666 - 426 = 240
240 ÷ 426 = 0.5633802816901409
0.5633802816901409 x 100 = 56.34%