Answer:
18.75 minutes or 0.3 (3/10 or almost 1/3)
Step-by-step explanation:
Carlos spent [tex]1\frac{1}{4}[/tex]hours doing math. If an hour is 60 minutes, this means he spent 60 minutes and 1/4 of 60 minutes which is 15 minutes. In total he spent 75 minutes on math.
We also know he spent 1/4 of that 75 minutes on multiplication facts. How long did he spend?
We will multiply by the two quantities to find the amount.
[tex]\frac{1}{4} (75)=\frac{75}{4} = 18.75 minutes[/tex]
We will convert this back into hours by dividing it by 60 minutes since 60 minutes= 1 hour.
[tex]\frac{18.75}{60} =0.31[/tex]
He spent 0.3 or 3/10 or about 1/3 of his time on multiplication facts.
