Ratios
The ratio of red to blue marbles in a bag is 5:2. If there are 15 red marbles, how many blue marbles are there?
6
6.4÷2
3.2
A store is having a sale where everything is 20% off. If a shirt costs $25, how much will the shirt cost after the discount?
The shirt will cost $20 after the 20% discount.
A road is 300 meters long. How many kilometers is that?
The road is 0.3 kilometers long.
Which number has the greatest absolute value: −12.5, −9, 3, 12, 5, 9?
12.5
There are 30 students in a class. The ratio of boys to girls is 4:5. How many boys are there in the class?
12
94.8 ÷1.2
7.9
In a class of 30 students, 18 are girls. What percent of the class are girls?
60%
A watermelon weighs 5 kilograms. How many grams does it weigh?
The watermelon weighs 5,000 grams.
x+5≤12
x≤7
A recipe calls for 2 parts flour and 3 parts sugar. If you want to make a total of 20 parts, how many parts of flour are needed?
8
0.25×0.4
0.10
A book originally costs $12. The price of the book increases by 25%. What is the new price of the book?
$15
A swimming pool holds 150,000 milliliters of water. How many liters is that?
The swimming pool holds 150 liters of water.
3x>9
x<3
The ratio of pencils to erasers in a box is 7:2. If there are 42 pencils, how many erasers are there?
42
3.5×0.6
2.10
There are 80 students in a school. If 60% of the students are boys, how many boys are there?
48 boys
A box weighs 3.5 pounds. How many ounces does it weigh?
The box weighs 56 ounces.
Order the following decimals from smallest to largest:
3.25,3.2,3.75,3.05
3.05,3.2,3.25,3.75
A fruit stand sells apples and bananas. The ratio of apples to bananas is 4:7. If there are 56 bananas, how many apples are there?
56
4.5×0.6
2.70
A concert ticket costs $60. If there is a 10% service fee, how much is the service fee?
$6
A piece of fabric is 150 centimeters long. How many meters is that?
The fabric is 1.5 meters long.
A triangle has a base of 7.5 meters and a height of 4.2 meters. What is the area of the triangle?
15.75