2.14% is the change from 421 to 430
Calculation steps:
[( 430 - 421 ) ÷ 421] x 100 = 2.14%
Formula
Percentage change = [(430 - 421) / 421] x 100
Subtract the new number by the original number
430 - 421 = 9
9 ÷ 421 = 0.021377672209026127
0.021377672209026127 x 100 = 2.14%