How do you simplify #4/5-4/7#?
Whenever we do addition or subtraction with fractions, we must have a common denominator.
The easiest way to achieve a common denominator is to multiply the top and bottom of the first by
Notice, we are not changing the value since we are essentially multiplying by
Now that we have common denominators, we can just subtract the numerators. We'll get
Since the numerator and denominator have no common factors, this fraction is in simplest form.
Hope this helps!