77.14% is the change from 420 to 744
Calculation steps:
[( 744 - 420 ) ÷ 420] x 100 = 77.14%
Formula
Percentage change = [(744 - 420) / 420] x 100
Subtract the new number by the original number
744 - 420 = 324
324 ÷ 420 = 0.7714285714285715
0.7714285714285715 x 100 = 77.14%