heyy xx how do i sbtract fractions from each other eg. 7/9 - 1/2

Question

please help xx

Answer 1

You must first find a common denominator. Usually, you try to find the smallest (or least) common denominator.

In your example, the common denominator is 18 (9 * 2). You have to change your fractions to fit this new denominator.

7/9 = 14/18 (We multiplied both the numerator and denominator by 2.)

1/2 = 9/18 (We multiplied both the numerator and denominator by 2.)

7/9 - 1/2
14/18 - 9/18

Now, subtract the numerators and keep the denominator. Then simplify, if possible.

For example, 4/9 - 1/9 = 3/9 = 1/3.

Answer 2

Oops, that should read...

1/2 = 9/18 (We multiplied both the numerator and denominator by 9.)