63.81% is the change from 420 to 688
Calculation steps:
[( 688 - 420 ) ÷ 420] x 100 = 63.81%
Formula
Percentage change = [(688 - 420) / 420] x 100
Subtract the new number by the original number
688 - 420 = 268
268 ÷ 420 = 0.638095238095238
0.638095238095238 x 100 = 63.81%