Answer: [tex]1\dfrac{3}{8}\ \text{inch}[/tex]
Step-by-step explanation:
Given
Rainfall in September is [tex]\frac{7}{8}[/tex] inch
Rainfall in October is [tex]2\frac{1}{4}[/tex] inch
Convert mixed fraction into fraction
[tex]\Rightarrow 2\dfrac{1}{4}=\dfrac{9}{4}\ \text{inch}[/tex]
Difference between the two gives that how much more rain fall in October compared to September
[tex]\Rightarrow \dfrac{9}{4}-\dfrac{7}{8}\\\\\Rightarrow \dfrac{18-7}{8}\\\\\Rightarrow \dfrac{11}{8}\ \text{inch or}\\\\\Rightarrow 1\dfrac{3}{8}\ \text{inch}[/tex]