Write the ratio in its simplest form.
Answer and explanation
Correct answer: C. 3 : 4 : 5
- Step 1: The highest common factor of , and is .
- Step 2: Divide each by : .
Answer
3 : 4 : 5.
Why not the others: 3 : 4 : 6: The last term has been divided by instead of , so the terms are not scaled equally. 4 : 5 : 6: These are consecutive numbers, which do not come from dividing every term by one common factor. 3 : 5 : 7: The three numbers have not all been divided by the same factor, so the ratio is not equivalent.
Practise more Ratio and Proportion.
Free questions with an explanation for every one, and full timed GCSE English and Maths Resits (Grade 4) mock tests.
More Ratio and Proportion questions
- A bike costs £ including VAT at . What was the price before VAT was added?
- A rectangle cm by cm is enlarged by scale factor . What is the perimeter of the enlarged rectangle?
- A car is worth £ and loses of its value each year. What is it worth after years?
- Change m into cm.
- Priya and Tom share stickers in the ratio . How many stickers does Priya get?
- of the students in a class are girls. What is the ratio of boys to girls?