Proportion Word Problems

Front

What is a proportion?

Back

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

Tags

CCSS.7.RP.A.2A

Front

How do you determine which option is a better buy when comparing prices?

Back

To determine the better buy, calculate the unit price for each option and compare them.

Tags

CCSS.6.RP.A.3B

Front

What is the unit price of an item?

Back

The unit price is the cost per single unit of measure, such as per item or per ounce.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If the ratio of cups of sugar to cups of flour is 1:5, how do you find the amount of sugar needed for a given amount of flour?

Back

Multiply the amount of flour by the ratio of sugar (1 part) to flour (5 parts).

Front

If Angel types 15 words in 10 seconds, how do you find out how many words he can type in 1 minute?

Back

First, find the rate of words per second (15 words / 10 seconds = 1.5 words/second). Then multiply by 60 seconds.

Tags

CCSS.6.RP.A.3B

Front

What is the formula to find the expected quantity based on a ratio?

Back

Expected quantity = (actual quantity) * (ratio of desired quantity / total ratio).

Tags

CCSS.6.RP.A.3C

Front

How do you solve a word problem involving proportions?

Back

Identify the ratios, set up a proportion equation, and solve for the unknown.

Tags

CCSS.7.RP.A.3

Front

What is the relationship between the size of a bottle and how long it lasts if the usage rate is constant?

Back

If the usage rate is constant, a larger bottle will last proportionally longer than a smaller bottle.

Tags

CCSS.7.RP.A.2D

Front

How do you convert a ratio to a fraction?

Back

To convert a ratio to a fraction, write the first number as the numerator and the second number as the denominator.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does it mean if 13 out of 20 homes have a personal computer?

Back

It means that the ratio of homes with computers to total homes is 13:20.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2