Complex Fractions and Proportions - DOK1

Front

What is a complex fraction?

Back

A complex fraction is a fraction where the numerator, the denominator, or both contain fractions.

Front

How do you determine if two ratios form a proportion?

Back

Two ratios form a proportion if they are equivalent, meaning their cross products are equal.

Front

What is a proportion?

Back

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

Front

What is the cross product of two ratios a/b and c/d?

Back

The cross product is ad and bc; if ad = bc, then the ratios are proportional.

Front

How do you simplify a complex fraction?

Back

To simplify a complex fraction, multiply the numerator and denominator by the least common denominator (LCD) of the fractions within it.

Front

What is the value of y in the equation 3/4 = y/12?

Back

y = 9, because 3/4 of 12 is 9.

Front

If A is 4 and B is 16, what is the ratio of A to B?

Back

The ratio of A to B is 1:4.

Front

What is the missing value of B if A is 5 and the ratio A:B is 1:4?

Back

B = 20, because if A is 5, B must be 4 times that.

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship or proportion.

Front

How can you find a missing value in a proportional relationship?

Back

You can use cross multiplication to find the missing value in a proportion.