math help

What is 3/10 - 9/10?

What is 3/10 - 9/10?

Here's how to subtract 9/10 from 3/10:

3
10
9
10

Step 1

Since our denominators match, we can subtract the numerators.

3 − 9 = -6

So the answer is:

-6
10

Step 2

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

-6
10
÷ 2 =
-3
5

Let's try dividing by 2 again...

Nope! So now we try the next greatest prime number, 3...

Nope! So now we try the next greatest prime number, 5...

No good. 5 is larger than -3. So we're done reducing.

There you have it! The final answer is:
3
10
9
10
=
3
5