How do you find a missing value in a proportion?

Cross-multiply the known values and solve for the unknown.

What does it mean if two ratios are equivalent?

It means that they represent the same relationship between quantities.

What is the relationship between ratios and fractions?

Ratios can be expressed as fractions, where the first term is the numerator and the second term is the denominator.

How can you express a ratio of 1:3 as a fraction?

As a fraction, it can be expressed as $$\frac{1}{3}$$ .

What is the first step in solving a proportion?

The first step is to cross-multiply the terms.

If the ratio of boys to girls in a class is 2:3, how many boys are there if there are 15 girls?

There are 10 boys, since 2/3 of the total (2+3=5) is boys.

ratio and proportions Flashcards: 15 Cards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

2.

FLASHCARD QUESTION

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

3.

FLASHCARD QUESTION

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

4.

FLASHCARD QUESTION

Front

What is the ratio of triangles to total shapes if there are 2 triangles and 5 total shapes?

Back

The ratio is 2:5.

5.

FLASHCARD QUESTION

Front

What is the missing proportion of $\frac{n}{6}$ if the answer is $\frac{5}{6}$ ?

Back

The missing proportion is $\frac{5}{6}$ .

6.

FLASHCARD QUESTION

Front

If there are 4 stars out of 15 total shapes, what is the ratio of stars to total shapes?

Back

The ratio is 4:15.

7.

FLASHCARD QUESTION

Front

What is the missing proportion of $\frac{n}{15}$ if the answer is $\frac{9}{15}$ ?

Back

The missing proportion is $\frac{9}{15}$ .

8.

FLASHCARD QUESTION

Front

What is the missing proportion to $\frac{n}{3}$ if the answer is $\frac{2}{3}$ ?

Back

The missing proportion is $\frac{2}{3}$ .

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