78.81% is the change from 420 to 751
Calculation steps:
[( 751 - 420 ) ÷ 420] x 100 = 78.81%
Formula
Percentage change = [(751 - 420) / 420] x 100
Subtract the new number by the original number
751 - 420 = 331
331 ÷ 420 = 0.7880952380952381
0.7880952380952381 x 100 = 78.81%