Question

It rained 3 1/4 inches in 2 1/2 hours how many inches did it rain per hour

Answer 1

`\begin{gathered} Let\text{ us first change the mix fractions to fractions} \\ 3(1)/(4)=(12+1)/(4)=(13)/(4) \\ 2(1)/(2)=(4+1)/(2)=(5)/(2) \\ \text{Now we can divide without fear the fractions} \\ ((13)/(4))/((5)/(2))=(13)/(4)\cdot(2)/(5)=(26)/(20)=(13)/(10)=1(3)/(10)\text{ inches per hour} \end{gathered}`