Question

Subtract two fractions

Answer 1

13/90

Explanation:

17/18 - 4/5 (we need to make both the denominators the same, so we'll need to do the cross multiplying method)

17 × 5 85

_______ = _____ (multiply)

18 × 5 90

4 × 18 72

_______ = ____ (multiply)

5 × 18 90

Now that we have the same denominators let's subtract the numerators. (remember, the denominator always stays the same)

85 72 13

___ _ ___ = ____ (13/90 is already in a simplified form)

90 90 90

So our final answer id 13/90

Answer 2

First you have to make the denominators the same so the fraction for 17/18 is going to be 85/90
Multiply the denominator and numerator by 5

Next you have to do the same thing with 4/5 to make it have the same denominator so you have to multiply the denominator and numerator by 18
72/90
Subtract 85/90 by 72/90 will be 13/90