Percentage increase. Percentage increase. Calculate the cost of each item. An antique lamp, bought 20 years ago for £50, has increased in value by 60%. 160% × £50. = 1.6 × £50. = £80. A jacket costing £86 requires VAT at 17.5% to be added. 117.5% × £86. = 1.175 × £86. = £101.05. - PowerPoint PPT Presentation
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