4/5-9/5

To subtract these two fractions, we first need to find a common denominator. In this case, the common denominator is 5.

Now, we rewrite the fractions with the common denominator:

4/5 - 9/5 = (4 - 9)/5 = -5/5 = -1

Therefore, 4/5 - 9/5 = -1.