Answer:
31/36
Step-by-step explanation:
13/12 - 2/9
*First, find common denominators. While we can go to a lower number…
12 - 4 - 3
9 - 3
*It’s sometimes easier to find a higher one so you don’t split the numerator into a decimal.
12 - 24 - 36
9 - 18 - 27 - 36
*Second, rewrite the fractions in the problem with the common denominator.
13/12 = 39/36
2/9 = 8/36
*Third, you can solve the problem and subtract only the numerators, leaving the denominators be.
39/36 - 8/36
31/36
*Last, you can simplify your final fraction. You do this by finding the lowest common factor, or LCF. In this case, 31 and 36 don’t have any common factors so we would leave our fraction as it is.