Submitted byVinitha.M

POWERPOINT PRESENTATION

RATIO AND PROPORTION

In miss.vinitha’s math class,she gives 2 pieces of bond paper for every

pupil.

We say that the ratio of pupils to bond paper is “1 to 2”.

We write it 1:2 or 1/2

What is ratio• A ratio is a comparison between two numbers.• It can be written in 2 ways:

1:2 or 1÷2 Colon Fraction

In our example, we compared the number of pupils to the number of sheets of bond paper.

If there are 5 pupils in miss.vintha’s class, how many sheets of bond paper should she distributed?

If there are 5 pupils in miss.vintha’s class, how many sheets of bond paper should she distributed?

The ratio of pupils to paper is: 5:10 or 5÷10

Understanding proportions

A proportion is an equation stating that two ratios are equalTo prove that two ratios form a proportion, you must prove that they are equivalent, To do this, you must demonstrate that the relationship between numerators is the same as the relationship between denominators.

Examples: Do the ratios form a proportion?

Yes, these two ratios form a proportion, because the szme relationshipExists in both the numerators and denominators.

No,these ratios do form a proportion,because the ratios are not equal

Thank you