Question

I have 3 questions needed! Help please! You can get 25 points! Please please please help me! Thanks!

1) Chole spent 15% of her allowance this month on bread. If she spent $45 on the bread, what was the total allowance?

2) A table cost $350. There is also a sales tax of 7%. How much does the table costs including the sales tax?

3) Joey bought a vintage t-shirt for $20. Then she turned around and sold it on eBay for $26. What was the percent increase in the price of the shirt?

Answer 1

1. so we are looking for how much her allowance is. Well we know that to get a percentage we just have to do the part over the whole and multiply by 100

so our equation looks like this
(45/x) *100 = 15%

we can change it to
45/x = .15
we need to solve for x. so let get
45 = .15x
45/.15 = x

x = 300

2. You do this by first finding out how much tax there is so
350 * .07 = 24.5
now add that to 35
350 + 24.5 = 374.5

3. So we got figure out how much she marked it up it just like the tax problem but in reverse
26 - 20 = 6
20 * x = 6
where x is the percent we are looking for

x = 6/20
x = .3
so she marked up 30%