78.38% is the change from 421 to 751
Calculation steps:
[( 751 - 421 ) ÷ 421] x 100 = 78.38%
Formula
Percentage change = [(751 - 421) / 421] x 100
Subtract the new number by the original number
751 - 421 = 330
330 ÷ 421 = 0.7838479809976246
0.7838479809976246 x 100 = 78.38%