Real life precentages

My two real life situations were:

#1 My mom was buying a shirt that is 80 USD. The shirt is  40% off. Plus she also had to pay the sales tax, which was 9.25%. What would be the total.
First you do the discount which is .40x80= 32
                                                              -80=48
Then its 0.09254x48=4.44
The answer is $52.44

# 2 Lunch has cost 44.75 dollars. How much is that with 20% tip?
Round to 5 and then add the tip =
$9 tip with a total of 53.75

How do you feel about fractions, decimals, and percentages?

What is confusing?

What is easy?

What do you want to know?

I think i feel good about this so far. Tax and tip still confuse me a little bit. But percentages are really fun.I would like learn more about tax and tip and decimal.