Write the proportion.

8.0 hours is to 4.8 hours as
7.0 hours is to 4.2 hours

To write this as a proportion, you can set up the two ratios as fractions and then make them equal to each other, because they represent the same relationship or ratio.

The proportion in terms of hours would be:

8.0 hours / 4.8 hours = 7.0 hours / 4.2 hours

Now, if you want to simplify this proportion:

(8.0 / 4.8) = (7.0 / 4.2)

Dividing both sides by their common factors:

(8.0 ÷ 0.8) / (4.8 ÷ 0.8) = (7.0 ÷ 0.7) / (4.2 ÷ 0.7)

This simplifies to:

10 / 6 = 10 / 6

Which, as a simplified proportion, can be reduced to:

5 / 3 = 5 / 3

Therefore, the proportion in its simplest form is:

5 is to 3 as 5 is to 3