Section outline
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A ratio is a share of a whole. When we divide up a Pizza into slices, they form part of the ratio. One person might have two pieces of pizza, one person might have one piece of pizza, one person who is very hungry might have three pieces of pizza. This means that the pizza is divided into six pieces in the ratio 2:1:3. We express ratios like this. The total of the parts of the ratio is 6 pieces (which is a whole pizza).
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