How to add fractions

MYTUTOR SUBJECT ANSWERS

Answers / Maths / GCSE / How to add fractions

604 views

How to add fractions

A: Firstly to add fractions the denominators have to be the same.

For example, 3/7 + 2/3

firstly you need to work out the lcm of 7 and 3, in this case it is 21.

So each fraction needs to be put into the form a/21 + b/21

For the fraction 3/7, you are timsing the 7 by 3 to get 21, so you also need to times the numerator by 3 leaving you with 9/21 which = 3/7

Then starting with 2/3, to get a denominator of 21, you need to times 3 by 7, so you also need to times the numerator by 7 leaving you with 14/21 which =2/3

Finally to add the 2 fractions 9/21 + 14/21 = 23/21

Other examples for you to try..

1) 3/5 + 2/3

2) 3/5 + 6/20

Jennifer L. GCSE Maths tutor, A Level Maths tutor, GCSE Chemistry tutor

2 years ago

Answered by Jennifer, a GCSE Maths tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

624 SUBJECT SPECIALISTS

Scott R. GCSE Maths tutor, 13 Plus Maths tutor, A Level Maths tutor,...

View profile

£24 /hr

Scott R.

Degree: PGCE Secondary Mathematics (Other) - Leeds University

Subjects offered:Maths, Further Mathematics

“I am currently completing 2 PGCEs in Leeds. I have always had a passion for maths and my objective is to help as many as possible reach their full potential.”

5.0