How can you interpret 2r2 as a fraction

Purplemath

Percentages refer to fractions of a whole; that is, whatever you're looking at, the percentage is how much of the whole thing you have. For instance, "50%" means "\frac{1}{2}  

2

1

​  

"; "25%" means "\frac{1}{4}  

4

1

​  

"; "40%" means "\frac{2}{5}  

5

2

​  

"; et cetera.

Often you will need to figure out what percentage of something another thing is. For instance, if a class has 26 students, and 14 are female, what percentage of the students are female? It is 14 out of 26, or \frac{14}{26}  

26

14

​  

 = 0.538461538462..., which is about 54%. (For more information on "percent" word problems, look at the Percent of lesson.)

MathHelp.com

Converting Decimals, Fractions, and Percents on MathHelp.com

Decimals and Percents

"Percent" is actually "per cent", meaning "out of a hundred". (It comes from the Latin per centum for "thoroughly hundred".) You can use this "out of a hundred" meaning, along with the fact that fractions are division, to convert between fractions, percents, and decimals.

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