Subtract the fractions and simpilfy the answer 13/15 - 1/5

Equation: 

When adding or subtracting, you have to make sure they have a common denominator

So you have to multiply  by 



Since they both have the same denominator, you subtract



One thing to note is when subtracting, you DO NOT subtract the denominator, only the numerators

To reduce to the lowest terms, you need to find a common factor.
5 goes into 10 two times and goes into 15 three times

 ÷ 

 ÷ 

That leaves it with the fraction 

 

11/2.2 = 5 inches for the length 8.5/2.2= 3.86 inches for the width

If you make it a little more clear i can answer it