Understanding Percents
What is 0.25 as a percent?
25%
What is 50% of 10?
5
The bill at the restaurant is $80. Bridget wants to tip the waiter 20%. How much is the TIP?
$16
The store is closing down and is having a clearance sale of 50% off. On the last day, the store gives an additional 50% off the original price. If a shirt cost $10, explain why the shirt will be free on the last day.
50% + 50% = 100% off the original price
What is 3% as a decimal?
0.03
What is 55% of 92?
50.6
ERROR ANALYSIS: There is a 4% tax on a new desk that costs $90. What is the TAX on the desk?
Find and correct the errors. (Hint: There are 2!)
0.4 * 90 = 36
90 + 36 = $126
4% = 0.04 not 0.4
The answer is $3.60 because we only want the TAX and NOT the total amount.
What is the percent decrease from 400 to 100?
A new water bottle costs $50. Ilyana has a coupon for 10% off. The store allows for an additional 40% off the sale price. What is the total Ilyana pays for her new water bottle?
$12
30% of what number is 12?
40
Anakaren wants to buy new shoes for $200. The store is having a sale for 45% off. How much do the shoes cost after the discount?
$110
On Valentine's Day, Ms. Kesten brought 25 pencils to give to her students. At the end of the day, she had 1 left. What was the percent change in pencils?
96% Decrease
The hat cost $20 with a 20% discount. There is a 5% tax added to the sale price. What is the total cost of the hat?
$16.80
What is 8.75% as a decimal?
0.0875
What percent of 80 is 28?
35%
The babysitter gets paid $15 an hour. He is trying to save up for a $300 phone that has 5% tax. How many hours does the babysitter have to work?
21 Hours
In a bag of marbles, 0.35 are blue, 1/5 are yellow, and 45% are red. Prove that this makes up 100% of the bag.
0.35 + 0.20 + 0.45 = 1
35% + 20% + 45% = 100%
35/100 + 20/100 + 45/100 = 100/100
Kamauri is buying a new computer for $545. There is a 3.75% tax on the computer. What is the total price Kamauri will pay? (Hint: Round to the nearest cent!)
$565.44
For the field trip, the school has to buy 32 matching shirts for the students.
Option A: The store sells the shirts for $12 each.
Option B: A website is selling the shirts for $18 each but the school has a coupon for 35% off the total cost. There is a 3% tax after the sale price.
Which is the better option for the school and by how much?
$384 vs. $385.63
Option A would be better because it cost $1.63 less.
Four families went on vacation together to Disney World. The total cost was $1300. They used a coupon for 20% off and a tax of 7% was applied after the coupon. How much did each family pay?
$278.20