WEEK ONE

TOPIC: RATIO AND PERCENTAGE

Meaning of ratio

The relation between two quantities (both of the same units) obtained by dividing one quantity with another is called ratio. A ratio can be denoted by using the symbol ( : ).

EXAMPLE 1 

What is the ratio between the weight of two bags of sugar of 4kg and 6kg respectively?

Solution

Ratio of weights of bags of sugar = 4kg/ 6kg = 2/3 = 2:3

EXAMPLE 2

A pole of length 165cm is divided into two parts such that lengths are in the ratio 7:8. Find the length of each part of the pole.

Total ratio = 7 + 8 = 15

First part = ^7/₁₅ , second part = 8/15

Length of first part = 7/15 of 165cm

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