78.33% is the change from 420 to 749
Calculation steps:
[( 749 - 420 ) ÷ 420] x 100 = 78.33%
Formula
Percentage change = [(749 - 420) / 420] x 100
Subtract the new number by the original number
749 - 420 = 329
329 ÷ 420 = 0.7833333333333333
0.7833333333333333 x 100 = 78.33%