Answer: [tex]\frac{2107}{5}[/tex]Step-by-step explanation: To write 421.4 in fraction form (with a numerator and the denominator), you must apply the following proccedure: - Divide it by 1 (Then the denominator is 1 for now and the numerator 421.4). - Multiply the numerator and the denominator by 10. - Reduce the fraction. Therefore, you obtain: [tex]\frac{421.4}{1}=\frac{421.4*10}{1*10}=\frac{4214}{10}=\frac{2107}{5}[/tex]