Question

Subtract -4/9 from -7/18

Answer 1

Explanation:

(-4/9) - (-7/18)

First we have to find the LCM (Least Common Multiple) between the two denominators.

9, 18

18

As you can see from above, 18 is the LCM of 9 and 18. Now we multiply the numerators with the amount of times you had to list the multiples. For 9 it's 2 times (9, 18), and for 18 it's 1 time (18).

So 4x2=8 and 7x1=7

We can now rewrite the fractions as so:

(-8/18) - (-7/18)

Since they're both negatives we change the second fraction to a positive

(-8/18) - (+7/18)

And if we subtract both we end up with

-1/18

I hope this helps, I tried to explain this in the most simplest way I can

Answer 2

Answer: 1/18

Explanation:

-4/9 is equivalent to -8/18. (-7/18) - (-8/18) = 1/18