3.8% is the change from 421 to 437
Calculation steps:
[( 437 - 421 ) ÷ 421] x 100 = 3.8%
Formula
Percentage change = [(437 - 421) / 421] x 100
Subtract the new number by the original number
437 - 421 = 16
16 ÷ 421 = 0.03800475059382423
0.03800475059382423 x 100 = 3.8%