The essentials of business numeracy The Numbers Guide , now in its fifth edition, is aimed at managers who have budgetary, planning or forecasting responsibilities and is invaluable for everyone who wants to be competent, and able to communicate effectively, with numbers. There are chapters on Key Concepts, Finance and investment, Measures for interpretation and analysis, Forecasting techniques, Sampling and hypothesis testing Incorporating judgments into decisions, Decision-making, Linearprogramming and networking. The guide also points out common pitfalls, such as: ? On rounding : Two times two makes four? Right? Wrong. The answer could be anywhere between two and six when dealing with rounded numbers. ? On percentages : If the inflation rate rises from 10% to 12% it has risen by two percentage points, but the actual percentage increase is 20%.

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