How do you write 6 1/2 miles and 1 1/4 miles as decimals?

Perform the division indicated by the fraction and add it to the integer.

½ = 0.5 and ¼ = 0.25

So, the respective decimal forms of the fractions are 6.5 and 1.25.

It is usually easier to convert a fraction to a decimal than to find a fraction from a decimal number.