GCSE Maths

Percentages as Decimals


As we've seen before, percentages can always be written in decimal form. Here's some more detail:

100% is everything there is: the whole thing, for example. One whole is 1, so in decimal form: 100% = 1. Similarly 1% is one hundredth, so 1% = 0·01.

We can write any other percentage as a number in between:

PercentageDecimal Equivalent

Note that 33% is not quite one third, whilst 66% is not quite two thirds.

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