Power over Percentages
Percent means part of 100. Percent (%) is a ratio (fraction) where the bottom number is 100.
eg., Mary got 80% on her test. She got 80 out of 100 answers right.
80% is 80/100.
- simple interest
Finding Percentage Technique
The easiest way to handle simple percentages is to use two fractions and 'cross-multiply' them.
Cross-multiply and divide
To find 40% of 60,
- we know that 40% of 60 is 40/100 of 60
- which can also be written as
- Then to find ?, we cross multiply: 40 × 60 = 2400,
- and then divide by the remaining number: 2400 ÷ 100 = 24
so 40% of 60 is 24.
Beating the Percentages
Return to Math Skills Index.
Partnering with Percentages
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