67.62% is the change from 420 to 704
Calculation steps:
[( 704 - 420 ) ÷ 420] x 100 = 67.62%
Formula
Percentage change = [(704 - 420) / 420] x 100
Subtract the new number by the original number
704 - 420 = 284
284 ÷ 420 = 0.6761904761904762
0.6761904761904762 x 100 = 67.62%