Fractions, decimals and percentages

So far we have been using fractions to write probabilities. You can also use percentages and decimal numbers. For example you might hear in a weather report that 'There's a 20% chance of rain.'

Writing a probability as a fraction, decimal or a percentage doesn't change it. Percentages and decimals are just other ways to write fractions.

So what is a 20% chance of rain? 20% is the same as . So there is a chance of rain.
You could use a decimal too, and say there is a 0.2 chance of rain.

Here are some conversions between fractions, percentages and decimals.

Fraction	Percentage	Decimal
1	100%	1
	75%	0.75
	66.67%	0.67
	50%	0.5
	33.33%	0.33
	25%	0.25
	20%	0.2
	10%	0.1

There are four Skillswise modules all about converting between fractions, decimals and percentages. They have more detail and explanation.
Go to the 'Fractions, decimals and percentages' page in Skillswise to find them. On that page look for the modules like the one called 'Comparing fractions and percentages'.