If Reginald answered 78% correctly out of a total 100%, we can subtract 78 from 100:
100 - 78 = 22
He answered 22% of the question incorrectly. But how do we find the bottom number? Remember what we said earlier. The <u>total</u> is 100%. He got 22% out of 100% wrong. Wouldn't that be ?
Now that we know our fraction, we can reduce it. Let's start by dividing our fraction in half:
=
Can we reduce that any more? No, because 11 can not be divided by anything else.
If you want the first fraction, go with , but if they want a reduced fraction, then would be best.