'Percent' means out of a hundred. If 60% of the population are brunette, this means 60 out of 100 people are brunette.
A percentage is a fraction of 100.
30% (30 in each 100) as a fraction is 30/100
30% as a decimal is 0.3.
If you need to find the percentage of a quantity, you must write the percentage as a fraction or decimal, then multiply by the quantity.
You might use this equation in real life, for example in a sale where you need to work out by how much an item is reduced.
If an item is 40% off, and is £50 we would work it out like this;
We firstly write 40% as a fraction: 40% = 40/100 = 4/10 = 2/5
Then we multiply by the quantity 2/5 × 50 = £20. There is £20 off the item.
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