Ratios: use the difference to find the total
The difference between the parts is a known number of items. Use it to find one part, then the total.
Loading a question…
You've done today's 10 free questions.
Come back tomorrow for 10 more, or get unlimited practice with a membership.
Want more today? Print 20 more questions free, with the answers.
Already a member? Sign in.
See worked examples
The ratio of apples to oranges is 4 : 1. There are 15 more apples than oranges. How many pieces of fruit are there in all?
Answer: 25
The ratio of hens to ducks is 3 : 2. There are 4 more hens than ducks. How many birds are there in all?
Answer: 20
The ratio of fiction books to non-fiction books is 2 : 1. There are 2 more fiction books than non-fiction books. How many books are there in all?
Answer: 6
Tip: The difference between the parts is a known number of items. Use it to find one part, then the total.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Next in this topic Map scale problems Year 6
- Ready for more Ratios: find the other quantity Year 7
Print a free worksheet with answers (20 questions).
Learn it hands-on
- Mix It, Pace It: Ratio, Rate and Percent Grades 6–7 · printable lessons
Practise without limits
Members practise as much as they like, every day, and get the printable packs and lessons too.