You can put this solution on YOUR website! When adding and subtracting fraction, you need to have the same denominator.
The quickest way is find the product of the denominators and change all the fractions to match.
In this case, the product is 7x8=56.
Now that you have both fractions with the same denominator you can subtract.
Since 69 and 56 do not have any common factors, your answer is in lowest terms.
