Proportions - Real world problems

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the two ratios and set the products equal to each other.

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.

Front

If the ratio of boys to girls is 3:1 and there are 4 girls, how many boys are there?

Back

12 boys

Front

Devon does 3 math problems every 2 minutes. How many problems does he do in 1 hour?

Back

90 questions

Front

What does it mean to average a certain number of correct answers?

Back

Averaging correct answers means finding the mean of the number of correct responses over a set of questions.

Front

If Adrian averages 2 out of 3 questions correct, how many will he get right on 12 questions?

Back

8 questions

Front

How do you find the total time needed to complete a task based on a rate?

Back

Multiply the total amount of work by the time it takes to complete a unit of work.

Front

Aryon reads 4 books every 3 weeks. How long will it take him to read 20 books?

Back

15 weeks

Front

If Chris saves $8 every 2 weeks, how many weeks will it take him to save $40?

Back

10 weeks