Introduction to Ratios and Proportions Flashcard

Front

What is a ratio?

Back

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

Back

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

Front

How do you find an equivalent ratio?

Back

To find an equivalent ratio, multiply or divide both terms of the ratio by the same non-zero number.

Front

What is the simplest form of the ratio 12:18?

Back

The simplest form of the ratio 12:18 is 2:3.

Front

If a room is 22 feet long and 19 feet wide, what is the area?

Back

The area is 22 feet * 19 feet = 418 square feet.

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal over its place value and simplify.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first term is the numerator and the second term is the denominator.

Front

What is the scale factor in a proportional drawing?

Back

The scale factor is the ratio of a length in the drawing to the corresponding length in the actual object.

Front

How do you round a number to the nearest hundredth?

Back

To round to the nearest hundredth, look at the third decimal place; if it's 5 or more, round up.