Part-to-Part Ratios
The ratio of tomatoes to red apples is 2:5. If there are 20 tomatoes, how many red apples are there?
There are 50 Red Apples.
If a water molecule has 2 hydrogen atoms for every 1 oxygen atom, what is the ratio of hydrogen atoms to total atoms in one molecule?
2:3, 2 to 3, 2/3
Are the ratios 1:2 and 6:16 equivalent?
No. A possible correct ratio would be 2:12.
What is a Ratio?
A Ratio is a way of comparing two or more quantities.
The ratio of bananas to melons is 30:1 If there are 300 bananas, how many melons are there?
There are 10 Melons.
In a Park, there are 8 Mallard Ducks and 5 Ruddy Ducks. What is the ratio of Mallard Ducks to the total number of ducks in the park?
8:13, 8 to 13, 8/13
Are the ratios 16:8 and 4:2 equivalent?
Yes. This is true because you can divide both members of the ratio 16:8 by 4, which gives you the equivalent ratio of 4:2.
What is a Part-to-Part Ratio?
Compares two separate parts of a larger whole.
The ratio of pears to green apples is 1:3. If there are 150 green apples, how many pears are there?
There are 50 pears.
In a class, there are 11 boys and 13 girls. What is the ratio of the number of girls in the class to the number of students in the class?
13:24, 13 to 24, 13/24
Are the ratios 5:4 and 17:16 equivalent?
No. A possible equivalent ratio would be 20:16.
What is a Part-to-Whole Ratio?
Compares one “part”, or quantity, of a group to the total amount of all parts (The “Whole”).
The ratio of blueberries to strawberries is 1:7. If there are 210 strawberries, how many blueberries are there?
There are 30 Blueberries.
A street artist has 3 colors of paint. They have 4 cans of orange paint, 7 cans of Green paint, and 8 cans of purple paint. What does the ratio 7:19 represent?
It represents the ratio of Cans of Green Paint to the total number of paint cans.
Are the ratios 14:16 and 5:8 equivalent?
No. An equivalent ratio would be 7:8.
What is a Rate?
A “Rate” is a ratio that compares the number of units of one quantity to 1 unit of another quantity.
The ratio of students getting an "A" in math to students getting a "B" is 3:5. If 21 students received an "A", how many received a "B"?
35 students recieved a "B".
Christian has a collection of 18 Shark Teeth. He has identified them as 6 Tiger Shark teeth, 8 Sand Shark teeth, and the rest as Bull Shark Teeth. What is the ratio of Bull Shark Teeth to the total amount of Shark Teeth?
4:18, 4 To 18, 4/18.
Are the ratios 4:2 and 10:5 equivalent?
Yes. This is because both members of the ratio 4:2 can be divided by 2 to give the equivalent ratio of 2:1. You can then multiply both members of this ratio by 5 to give the equivalent ratio of 10:5.
What are Equivalent Ratios?
Equivalent ratios have the same value. To determine whether two ratios are equivalent, write them as fractions and reduce them. If the fractions are equal, the ratios are equivalent.