## Friday, May 7, 2010

### Chap 9: Rate, Ratio and Proportion

Self Directed Learning (week 9)
2 tasks attached to be completed

• What is/ the key difference/s between ratio and proportion?
• What are the rules you have to observe in ratio and proportion?
Go through the following activities
[the critical activities are identified with *]
factsheet include the following:
1. What is ratio? 2. Understanding direct proportion? 3. Using Direct Proportion
4. Simplifying ratios? 5. Tips for ratio and proportion sums 6. Key words

simple game to practice ratio:

worksheet 2, 3 & 5 compulsory (*)

Self directed quiz with 3 different level of difficulties (*)

Task 2 : [to be submitted]
before completing the assignment review what you have covered in this chapter

1-02 & 1-05 : use your exercise books
1-08 & 1-09 : use fool scap papers
[akan datang]

1. Task 1: a. A ratio is a comparison of numbers that can be expressed as a fraction. A proportion is a statement that one ration is equal to another a ratio.
b. The order of the numbers in a ratio is important and must not be in the wrong order. The ratio in the proportion must be the same.

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A ratio is a comparison of two numbers. We generally separate the two numbers in the ratio with a colon (:). Suppose we want to write the ratio of 8 and 12.
We can write this as 8:12 or as a fraction 8/12, and we say the ratio is eight to twelve.
A proportion is an equation with a ratio on each side. It is a statement that two ratios are equal.
3/4 = 6/8 is an example of a proportion.