How do you solve a ratio problem GCSE?

How do you solve a ratio problem GCSE?

How to solve a ratio problem

1. Add together the parts of the ratio to find the total number of shares.
2. Divide the total amount by the total number of shares.
3. Multiply by the number of shares required.

How do you simplify a ratio GCSE?

Ratios can be fully simplified just like fractions. To simplify a ratio, divide all of the numbers in the ratio by the same number until they cannot be divided any more….Simplify these ratios fully:

1. 4 : 6.
2. 9 : 12.
3. 5 : 10 : 15.

How do I calculate a ratio between two numbers?

Ratios compare two numbers, usually by dividing them. If you are comparing one data point (A) to another data point (B), your formula would be A/B. This means you are dividing information A by information B. For example, if A is five and B is 10, your ratio will be 5/10.

How do you work out ratios ks3?

1. To work this out, look for a number that will divide into 40 and 28 .
2. 2 divides into both numbers, so 40 : 28 can be written as 20 : 14 .
3. You can divide these by 2 , so the simplified ratio is 10 : 7 .
4. No number divides into 10 and 7 exactly, so 10 : 7 is the simplest form of the ratio.

How do you work out ratios on a calculator?

Press the divide button, enter the greatest common factor and press the equals button. Write this number down. In this example, you work out 84 ÷ 12 = 7. Express your ratio using the number in Step 3 and the number in Step 5.

How do you write ratios in simplest form?

Example: Simplify the ratio 8 : 36

1. The factors of 8 are: 1, 2, 4, 8.
2. The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36.
3. The greatest common factor of 8 and 36 is 4.
4. Divide both terms by 4.
5. 8 ÷ 4 = 2.
6. 36 ÷ 4 = 9.
7. Rewrite the ratio using the results. The simplified ratio is 2 : 9.
8. 8 : 36 = 2 : 9 in simplest form.

What is a simple ratio?

Definition. A ratio is in its simplest form when both sides are whole numbers and there is no whole number that both sides can be divided by. Consider ratios of whole numbers for example, 6:4. It can be written as the fraction 64.

How do you calculate ratios on a calculator?

How do you find the ratio of a geometric sequence?

To calculate the common ratio in a geometric sequence, divide the n^th term by the (n – 1)^th term. Start with the last term and divide by the preceding term. Continue to divide several times to be sure there is a common ratio.