Ratios and Proportions warm up

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, expressed as 'a to b' or a:b.

Front

What is a proportion?

Back

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

Front

How do you determine if two ratios form a proportion?

Back

Two ratios form a proportion if their cross products are equal.

Front

What is the ratio of bananas to total pieces of fruit if there are 2 bananas and 15 total fruits?

Back

The ratio is 2:15.

Front

Are the ratios 4:5 and 28:35 equivalent?

Back

Yes, they are equivalent because both simplify to 4:5.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then divide to find the unknown.

Front

What is the cross product of the ratios 11/10 and 22/X?

Back

The cross product is 11*X = 10*22.

Front

If 3 seals are part of a total of 8 animals, what is the ratio of seals to animals?

Back

The ratio is 3:8.

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship between quantities.

Front

If a ratio is 5:2, what is the equivalent ratio if both terms are multiplied by 3?

Back

The equivalent ratio is 15:6.