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.
heyy xx how do i sbtract fractions from each other eg. 7/9 - 1/2
please help xx
2 answers
Oops, that should read...
1/2 = 9/18 (We multiplied both the numerator and denominator by 9.)
1/2 = 9/18 (We multiplied both the numerator and denominator by 9.)