How can you evaluate #24/7-21/2+11/14#?
Find a common denominator for your three fractions, then add their numerators.
In order to be able to add and/or substract fractions, you have to have common denominators. In your case, the common denominator for these three fractions is
In order to get the first two fractions to match this denominator, you have to multiply them by
This is equivalent to
Now simply add and subtract their numerators to get the final fraction