Percents
What is 25% of 200?
50
A recipe calls for 4 cups of flour to make 8 muffins. How much flour is needed for 20 muffins?
10 cups
A car travels 120 miles in 3 hours. What is the unit rate?
40 miles per hour
A map scale is 1 inch = 5 miles. If two towns are 3 inches apart on the map, how far apart are they in real life?
15 miles
What is the constant of proportionality if y=5x.
5
A shirt costs $40. If it is on sale for 20% off, what is the sale price?
$32
If 3 pencils cost $1.50, how much do 10 pencils cost?
$5
A grocery store sells 8 apples for $4. What is the price per apple?
$0.50 per apple
A rectangle has dimensions of 4 cm by 6 cm. A similar rectangle has a shorter side of 8 cm. What is the length of the longer side?
12 cm
You invest $1,000 at an interest rate of 5% per year. How much simple interest do you earn in 3 years?
$150
40% of what is 140?
If 12 pens cost $7.20, what is the cost of 5 pens?
$3
If a runner covers 15 miles in 2.5 hours, what is their speed in miles per hour?
6 miles per hour
The scale of a model is 2:50. If a real car is 70 inches long, how long is the model car?
2.8 inches
A student measured an object as 12 inches, but the actual length was 10 inches. What is the percent error?
20%
A population increases from 1,200 to 1,500. What is the percent increase?
25%
Two figures are similar. One has sides of 4 cm, 5 cm, and 6 cm. The other has sides of 8 cm, 10 cm, and x. Find x.
x=12
A machine makes 300 widgets in 5 hours. How many widgets does it produce per hour?
60 widgets per hour
Two triangles are similar. The sides of one triangle are 6 cm, 8 cm, and 10 cm. If the smallest side of the other triangle is 9 cm, what is the length of the longest side?
15 cm
The price of a laptop decreased from $1,200 to $900. What is the percent decrease?
25% decrease
A student scored 80% on a test with 25 questions. How many questions did they answer incorrectly?
5
A scale drawing of a room in a house is 5 in:21 miles. If the length of the drawing is 7 in and the width of the drawing is 11 inches, what is the actual area of the room?
1,358.28 square miles
A cyclist rides 35 kilometers in 2.5 hours. What is their speed in kilometers per hour?
14 km/hr
A scale drawing of a house has dimensions 2 ft by 3 ft. If the actual house is 20 ft wide, what is its actual length?
30 feet
How much money do you borrow for a car is you owe $1,400 in interest over 5 years and 3.2% interest rate.
$8,750