Simple Interest
A savings account begins with $900 and earns 5% simple interest over the course of 10 years. Find the interest earned.
$450
You purchase a Pink Drink for $6.89, which included a 7.5% sales tax. What was the price of the drink before the tax was added?
$6.41
An item that costs x dollars is marked down 20%. Later, the item is marked down an additional 20%. What is the overall percent discount for the item?
36%
Which options represent 5% of 32?
a. 0.05 • 32
b. 0.05 • 0.32
c. 5/100 • 32
d. 0.5 • 32
a and c
An account has earned $75 in simple annual interest over the course of 2 years. The interest rate was 6.5%. Find the principal. Round to the nearest cent.
$576.92
A women bought two dresses. A $90 pink dress was on sale for 10% off, while a $40 blue dress was on sale for 5% off. What percent did she save on her purchase of the two dresses?
pink dress = $81
blue dress = $38
saved = $11
11/130 = 8.5%
At the Popham House Assembly 32% of the students are in the 6th grade, 35% are in the 7th grade, and 33% are in the 8th grade. If 8% of the 6th grade wears glasses, 7% of the 7th grade wears glasses, and 5% of the 8th grade wears glasses, what is the overall percent of students who wear glasses?
6th 2.56%
7th 2.45%
8th 1.65%
Total 6.66%
A swimming pool had 2.5 million liters of water in it. Some water evaporated, and then the pool only had 2 million liters of water in it.
What percent of the water evaporated?
20%
An account earned $15.50 in simple annual interest over the course of 2 years. The principal amount was $700. Calculate the interest rate. Round to the nearest tenth of a percent.
1.1%
Boats 4 Less purchases a boat for $12,000. They then mark up the price by 75%. After a week they decide to offer a 10% discount. Sylvia purchases the boat and must pay a 4.5% sales tax as part of the purchase. How much did Sylvia pay for the boat?
$19,750.50
A car was marked up 100% by Cars for Less. After not selling, the company offered a 25% off sale. After a 6% sales tax, the car was purchased for $28,620. What was the wholesale cost (cost price) of the car?
$18,000
Nick is exactly 25 years old on New Year’s Day of 2024, while Doug is exactly d years old on the same day. On New Year’s Day 2017, Doug was 50% older than Nick. What is the value of d?
34
Students at Baldwin Middle School cast 432 votes for student government president. If the number of votes the losing candidate received was 60% of the number that the winner received, how many more votes than the loser did the winner receive?
winner = x
loser = 0.6x
x + 0.6x = 432
1.6x = 432
x = 270
0.6 • 270 = 162
difference is 108
If Sanjay runs 75% as far as Jerome in the eighth-grade race, what percent of Sanjay’s distance does Jerome run?
sanjay = 75
jerome = 100
100/75 = 4/3 = 1 1/3 = 133.33%
Jin adds 1 gallon of a water-and-bleach mixture that is 4% bleach to 2 gallons of a water-and-bleach mixture that is 10% bleach. What percent of the final mixture is bleach?
8%
Bart, Lisa, and Maggie each contributed money to buy a present that cost $115.50 for their friend. Bart and Lisa contributed $58 and $x, respectively, and Maggie paid 25% of the total contribution from Bart and Lisa.
Find x and how much Maggie contributed.
x = $34.40
Maggie = $23.10