Christmas Light Ratios

Front

What is a ratio?

Back

A ratio is a relationship between two numbers that shows how many times the first number contains the second.

Front

How do you express a ratio?

Back

A ratio can be expressed in three ways: using a colon (e.g., 2:3), as a fraction (e.g., 2/3), or with the word 'to' (e.g., 2 to 3).

Front

If there is 1 blue bulb, how many red bulbs are there if the ratio of blue to red is 1:2?

Back

2 red bulbs.

Front

If there are 400 green bulbs, how many red bulbs are there if the ratio of green to red is 1:1?

Back

400 red bulbs.

Front

What is the total number of bulbs if there are 15 red bulbs and the ratio of red to total bulbs is 1:3?

Back

45 bulbs.

Front

What is the ratio of blue to green to red if there are 2 blue, 4 green, and 4 red bulbs?

Back

2:4:4.

Front

What is the ratio of blue to green to red if there are 4 blue, 2 green, and 3 red bulbs?

Back

4:2:3.

Front

How do you find the total number of bulbs given a ratio?

Back

Add the parts of the ratio together and multiply by the common factor.

Front

What does it mean if a ratio is simplified?

Back

A simplified ratio has no common factors other than 1.

Front

If the ratio of blue to red is 2:3, how many red bulbs are there if there are 6 blue bulbs?

Back

9 red bulbs.