76.72% is the change from 421 to 744
Calculation steps:
[( 744 - 421 ) ÷ 421] x 100 = 76.72%
Formula
Percentage change = [(744 - 421) / 421] x 100
Subtract the new number by the original number
744 - 421 = 323
323 ÷ 421 = 0.7672209026128266
0.7672209026128266 x 100 = 76.72%