Ratio, proportion and percentages
Ratio, proportion and percentages

This free course is available to start right now. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation.

Free course

Ratio, proportion and percentages

1.4.1 Try some yourself

Activity 5

Convert each of the following fraction ratios to decimal ratios.

  • (a)

  • (b)

  • (c)

  • (d)

Answer

  • (a) = 0.2

  • (b) = 0.3333 ... this repeats indefinitely. As a decimal, you need to terminate after some finite number of places, e.g. 0.3333 to four decimal places.

  • (c) = 1.5

  • (d) = 2.25

    Alternatively, 2 is 2.00, is 0.25, and adding them together gives 2.25.

Activity 6

Convert each of the following decimal ratios to fraction ratios.

  • (a) 0.25

  • (b) 1.135

  • (c) 0.064

Answer

  • (a) 0.25 =

  • (b)1.135 =

  • (c)0.064 =

Activity 7

A recipe for a casserole involves soaking dried beans. The beans require litres of water per kilogram of beans. If you have kilograms of beans, how much water is required?

Answer

You need to multiply by . First convert to top-heavy fractions or decimals:

Follow-up in Section 3.1.2

Alternatively 2.5 × 1.75 = 4.375.

So or 4.375 litres of water is required.

MU120_4M3

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has over 40 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to university level study, find out more about the types of qualifications we offer, including our entry level Access courses and Certificates.

Not ready for University study then browse over 900 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus