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(i) Percentages are used to calculate sale prices. (ii) To calculate 35% of a number, multiply the number by 0.35. (iii) Percentages are a ratio of a number out of 100. For example, 16% means 16 out of 100. (iv) You should always calculate percentages exactly. (2) Refer back to Lessons 1.1 and 1.2. ................
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