Proportions Flashcardz

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a:b'.

Front

How do you simplify a ratio?

Back

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

Front

What is the ratio of peanut butter cookies to oatmeal cookies if there are 30 boxes of peanut butter cookies and 18 boxes of oatmeal cookies?

Back

The ratio is 5:3.

Front

What is the total number of boxes of cookies if there are 32 chocolate chip, 18 oatmeal, and 30 peanut butter cookies?

Back

The total is 80 boxes.

Front

How do you convert a fraction to a decimal?

Back

Divide the numerator by the denominator.

Front

If a blueprint uses a scale of 1/8 inch = 5 feet, how do you find the actual size of an object?

Back

Multiply the length in inches by 5 and then divide by 1/8.

Front

What is the formula to calculate miles per gallon (MPG)?

Back

MPG = Total miles driven / Total gallons of gas used.

Front

What is the simplest form of the ratio 14 inches to 4 feet?

Back

The simplest form is 7:14.

Front

How do you find the GCD of two numbers?

Back

List the factors of both numbers and find the largest factor they have in common.

Front

What does it mean to divide fractions?

Back

To divide fractions, multiply by the reciprocal of the divisor.