Question

How do you simplify `9/10 - 1/5`?

Answer 1

Find a common denominator, then subtract.

Explanation:

To find a common denominator, we need to find the least common multiple between the two denominators. In our case, the LCM (last common multiple) is 10 because `10*1=10` and `5*2=10`. Our expression now looks like this:

`9/10-2/10`

From here, it's simple subtraction:

`9-2=7`

`9/10-2/10=7/10`