Well you can make a proportion to see if the values (2 miles in 1/2 hour and 1 mile in 15 minutes) are equal to each other or not.
**We need to convert 15 minutes into hours --> 15 minutes / 60 minutes = 1/4 hour [tex] \frac{2 \text{ miles}}{ \frac{1}{2} \text{ hours} } = \frac{1 \text{ mile}}{ \frac{1}{4} \text {hour}} [/tex]
Cross-multiply...
1/2(1) = 2(1/4) *is this true?
1/2 = 2/4 *if you simplify 2/4 by dividing the numerator and denominator by 2 you get 1/2
1/2 = 1/2 **this is correct!
So it is true!
