51.64% is the change from 426 to 646
Calculation steps:
[( 646 - 426 ) ÷ 426] x 100 = 51.64%
Formula
Percentage change = [(646 - 426) / 426] x 100
Subtract the new number by the original number
646 - 426 = 220
220 ÷ 426 = 0.5164319248826291
0.5164319248826291 x 100 = 51.64%