18/45=28.8/72

To compare the fractions 18/45 and 28.8/72, we need to make sure they are in the same format. Let's convert the decimal 28.8 to a fraction.

28.8 can be written as 288/10 because there is one decimal place after 8.

Now, let's compare 18/45 and 288/72:

To find the relation between the two fractions, we can simplify them further.

18/45 simplifies to 2/5 by dividing both the numerator and the denominator by their greatest common divisor, which is 9.

288/72 simplifies to 4/1, again by dividing both the numerator and the denominator by their greatest common divisor, which is 72.

Therefore, 18/45 is equal to 2/5, and 28.8/72 is equal to 4/1.