Читать книгу SAT Math For Dummies with Online Practice - Mark Zegarelli - Страница 45

Sometimes when a fraction has a large numerator and denominator, you can simplify it by dividing both of these numbers by the same value, resulting in an equivalent fraction. For example:

The most simplified form of a fraction is usually the form that an SAT answer will take.

You can also reverse this process to increase the denominator of a fraction by multiplying the numerator and denominator by the same value.

Increasing the denominator of a fraction is often useful for adding and subtracting fractions, which I discuss in the next section.