![]() ![]() We do that by adding all the numbers in the ratio: Next we need to understand the relationship of each part or proportion to the ‘whole’ and for that we need to calculate what the whole is. ![]() For example, newspaper advertising is 10 as a proportion of the whole, the website is 5 and referrals only make up the small proportion of 1. The word ‘respectively’ means that the order of the numbers in the ratio (10, 5 and 1) relate to the ‘parts’ in the same order. Or they can be described specifically using ratios, for example, the proportion of enquiries between newspaper advertising, the website and referrals is 10:5:1 respectively. Proportions can be described in general terms a small proportion of enquiries are generated by referrals. Firstly we need to know that when we talk about proportions, we simply mean a ‘part’, ‘share’, ‘bit’ or ‘number’ of a whole. Let’s now look at how this relates to proportions and ratios.
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