4.73% is the change from 402 to 421
Calculation steps:
[( 421 - 402 ) ÷ 402] x 100 = 4.73%
Formula
Percentage change = [(421 - 402) / 402] x 100
Subtract the new number by the original number
421 - 402 = 19
19 ÷ 402 = 0.0472636815920398
0.0472636815920398 x 100 = 4.73%