Lesson 6.1: Fractions, Decimals, and Percents
Write 74% as a decimal.
0.74
What percent of 60 is 18?
30%
Find the percent of decrease from 90 people to 45 people.
50% decrease
Find the selling price of a $50 pair of shoes after a 25% markup.
$62.50
Arnold puts $580 into a savings account. The account pays 3% simple interest. How much interest will he earn in five years?
$87
Write 0.079 as a percent.
7.9%
What number is 70% of 70?
49
Find the percent of increase from 6 yards to 36 yards.
500%
Find the sales price of a $75 jacket after a 20% discount.
$60
You deposit $500 in a savings account. The account earns 3% simple interest per year. What is the balance after 3 years?
$545
Write 3/8 as a percent.
37.5%
3/4 is 75% of what number?
1
Yesterday it took 40 minutes to drive to school. Today, it took 32 minutes to drive to school.
1.) What is the percent change in the time to drive to school?
2.) Is this a percent of decrease or increase?
20% decrease
Find the original price of a tennis racquet that is $21 after a 30% discount.
$30
You deposit $1200 in an account. The account earns $426.00 in simple interest in 5 years. What is the annual interest rate?
7.1%
Which list of numbers is ordered from least to greatest?
A.) 66.1%, 0.66, 2/3, 0.667
B.) 0.66, 66.1%, 0.667, 2/3
C.) 0.66, 2/3, 66.1%, 0.667
D.) 0.66, 66.1%, 2/3, 0.667
D
At a school, 15% of the parking spaces are accessible parking spaces. The school has 18 accessible parking spaces. How many parking spaces are there in total?
120 accessible parking spaces.
You estimate that a jar contains 68 marbles. The actual number of marbles is 60. Find the percent error.
about 13.3%
The discount on a toy robot is 40%. The toy robot is on sale for $54. Find the original price.
$90
How long does it take an account with a principal of $1,525 to earn $237.90 in interest at a simple annual interest rate of 2.6%?
6 years
For school spirit day, 11.875% of your class wears orange shirts, 5/8 of your class wears blue shirts, 0.15625 of your class wears white shirts, and the rest of your class wears gold shirts.
1.) What is the percent of the class that wears gold shirts?
2.) Order the portions of shirts of each color from least to greatest using percentages.
Gold: 10%
Order: 10%, 11.875%, 15.625%, and 62.5%
(gold, orange, white, blue)
Of the neighborhoods in a county, the ratio of urban to rural neighborhoods is 5 : 3. Find the percent of rural neighborhoods in the county.
37.5%
The density of water at 4°C is known to be 1.00 g/ml. Kayla experimentally found the density of water to be 1.075 g/ml. What is her percent error?
7.5%
Kohls and Macys are having a sale. At Kohls, a pair of sneakers cost $45 after a 25% discount. At Macys, the same brand of sneakers is discounted 30% for a price of $55. Which store has the better sale? Explain by finding the original price of both sneakers.
Round your answer to the nearest hundredth if necessary.
The original price for Kohls is :$60.00
The original price for Macys is: $78.57
So Kohls has the the better sale!
You deposit $500 in an account that earns 4% simple annual interest. The interest earned each year is added to the principal to create a new principal. Find the total amount in your account after each year for 3 years. Explain your reasoning.
Year 1 = $520;
Year 2 = $540.80;
Year 3 = $562.43;
Using the simple interest formula, after 1 year $20 in interest has accumulated, so the total is $520. After another year, $20.80 in interest has accumulated, making the total $540.80. After 1 more year, $21.63 of interest has accumulated, making the total $562.43.