54.05% is the change from 420 to 647
Calculation steps:
[( 647 - 420 ) ÷ 420] x 100 = 54.05%
Formula
Percentage change = [(647 - 420) / 420] x 100
Subtract the new number by the original number
647 - 420 = 227
227 ÷ 420 = 0.5404761904761904
0.5404761904761904 x 100 = 54.05%