Answer:
55%
Explanation:
We can infer a few things here and come to a logical conclusion.
$9 is not exactly half of 20 right?
So this tells us that our answer needs to be over 50% because a 50% discount would make the bookbag $10.
If we look at the answers only 1 of them is over 50% and that is 55%.
However, let's check our work
First we multiply 20 by .55 (when multiplying a percent we move the decimal over twice)
We got 11 out of this, the next thing we do is subtract that 11 from the overall 20:
Therefore we see that 55% is the answer!
Hope this helps!!
- Kay