Index numbers
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}An index number is a technique for comparing, over time, changes in some feature of a group of items (e.g. priceor quantity) by expressing the property each period as a percentage of someearlier period.
}An index number is calculated as:
}Current period value ÷ base period value × base period index (usually 100)
}Index numbers can also be used toforecast future data to be in cash flows.
}The formula for using an index is:
}Current index ÷ base index × base value

