4.21% is the change from 451 to 470
Calculation steps:
[( 470 - 451 ) ÷ 451] x 100 = 4.21%
Formula
Percentage change = [(470 - 451) / 451] x 100
Subtract the new number by the original number
470 - 451 = 19
19 ÷ 451 = 0.04212860310421286
0.04212860310421286 x 100 = 4.21%