# Write a ratio as a percent using a decimal

## Decimal to percent

And if we write it as a simplified fraction, we need to see if there is a common factor for 18 and That is, a ratio compares numerical quantities in terms of the number of parts out of The right side of the number line has a number scale. In more complicated problems this dual-scale number line is a good way of organising the information we are given and to work out what information we need to find. In this case 1 litre of blue to 4 litres of white, making 5 litres of sky blue paint. Create an account to get more Track your progress Review and track your learning through your OpenLearn Profile. Example 2: Ryan spent 25 minutes in the bank, 11 minutes of which was spent waiting in a queue. This means there is a ratio of blue to white of Not ready for University study then browse over free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released. As stated earlier, ratios are typically written with a colon. Sometimes, you may be asked to round to a certain number of places. So this is the fraction in simplest form.

Every year, thousands of students decide to study with The Open University. Examples: Rewrite As stated earlier, ratios are typically written with a colon.

### 3 part ratio to percentage calculator

But if you want to express this as a decimal without the percent, you just move the decimal to the left two spaces. So this literally means 18 per We know that there are 50 apples in total, ie. And they're both even numbers, so we know they're both divisible by 2, so let's divide both the numerator and the denominator by 2. Example 2: Ryan spent 25 minutes in the bank, 11 minutes of which was spent waiting in a queue. To say or write 5 : 2, for example, has no meaning on its own. This literally means 18 per , or 18 hundredths. A CD earns 2. From here we can go straight to a decimal or we could do this fraction in simplest form. Percent models Dual-scale number line model We can use the dual-scale number line, also called the proportional number line, to illustrate example 1 from above. Again we use the definition of percent and write the ratio in fraction form, but note that the numerator contains a decimal in terms of tenths. What percent is 10 of 50? Divide the numerator top number by the denominator bottom number in your fraction. Once we have represented the problem in this way we can write a proportion equation directly from the number line.

This fact makes ratios very versatile to use in everyday situations. And another way to think about it, you could view this as I'm actually separating out the percent, it's only going to be one word, but I'm writing it as, literally, per cent.

Examples: Rewrite and as common fractions. Example 3: What percent is 7 cm of 20 cm? A percent is a special type of ratio where the second value is always Review the course When you have finished a course leave a review and tell others what you think.

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## 1:3:4 ratio to percentage

Examples: Rewrite This literally means 18 per , or 18 hundredths. Note that the word percent is a statement of a ratio relationship and English "per cent" is derived from Latin "per centum" which means "per hundred". The dual-scale number line model is discussed further in the other pages of the Percent, Ratio and Rates topic. Full copyright details can be found in the Acknowledgements section of each week. Recall example 1: 30 out of 50 apples in a box are too bruised to sell. Working Out Thinking To find out what percent 7 out of 20 is, we need to ask: 7 out of 20 is how many out of ? Now, I went through a lot of pain here to show you that this really just comes from the word, from percent, from per Each of the problems involves percentages, which are a very common method for stating ratios involving monetary values. And we're going to get 18 divided by 2 is 9. We can label each scale using the information we are given in the problem.

To say or write 5 : 2, for example, has no meaning on its own. Elastic tape measure model The tape measure model is a good linear model of percent. The ratios of and are equivalent, and worked out in the same way as equivalent fractions.

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