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Percentages that do not add · Part 3 of 3

A stock you hold moves by the percentages given in each part. Percentage changes compound on the new price, not on the original one.

Over three days the stock moves −10%, +15% and −5%. What is the net change, in per cent, to two decimal places?

Answer with a number. Fractions, powers and expressions like 23/6 or C(52,5) are read correctly in practice.

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Arithmetic that survives a clock

Over three days the stock moves −10%, +15% and −5%. What is the net change, in per cent, to two decimal places?

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