Answer:
18 : 5
Step-by-step explanation:
[tex]\text{Convert}\ 1\dfrac{1}{2}\ h\ \text{to minutes.}\\\\\text{We know:}\ 1\ h=60\ min.\ \text{Therefore}\ 1\dfrac{1}{2}\ h=\left(1\dfrac{1}{2}\right)(60\ min)=90\ min\\\\\left(1\dfrac{1}{2}\ h\right):\left(25\ min\right)=(90\ min):(25\ min)=\dfrac{90}{25}=\dfrac{90:5}{25:5}=\dfrac{18}{5}=18:5[/tex]
