The quantity 1 as a fraction, it's simply 1 over 1. 1 divided by 1 is 1, right? The same goes for any fraction where the result is 1. Say 100/100. The answer to that is 1. A number divided by itself will always make 1.
Another way is to take any fraction where the numerator is not zero, and multiply it by its reciprocal. 2/3 does not have zero as the numerator (the number on top). The reciprocal is the top and bottom numbers switched. So the reciprocal of 2/3 is 3/2. Now if you multiply them, you get 6/6 which is one.
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There are infinitely many different ways to make groups of fractions that sum to 1.
A "whole" is typically represented by the fraction 1, as it signifies the entirety of something. In terms of fractions that make a whole, any two fractions that add up to 1 would fit this criteria. For example, 1/2 and 1/2, or 3/4 and 1/4 would both make a whole when added together.
IIS The Romans counted fractions in 1/12ths. S is for 6/12 (or 1/2). To make fractions less than 6/12, make a dot in front of S for each 1/12. And to make fractions larger than 6/12 make a dot after the S for each 1/12. See the link to the Wikipedia article for more explanation of this.
1 Fractions are part of an entity or an integer 2 Fractions have upper numerators 3 Fractions have lower denominators 4 Fractions have a solidus line separating the numerator and denominator 5 Fractions can be equivalent such as 1/2 = 2/4 6 Fractions can be proper such as 0.25 = 1/4 7 Fractions can be improper such as 1.25 = 5/4 8 Fractions need a lowest common denominator to be added or subtracted 9 Fractions need an highest common factor to simplify them 10 Fractions are all rational numbers 11 Fractions can be converted into percentages because 3/4 = 75% 12 Fractions can be multiplied because 1/4*3/5*1/3 = 3/60 => 1/20 13 Fractions can be divided because 1/2 divided by 1/2 = 2/2 => 1 14 Fractions were used by the Romans to a limited extent 15 Fractions raised to the power of 0 always equals 1 16 Fractions form a part of mixed numbers as for example 5/4 = 1 and a 1/4 QED by David Gambell
the 3 comon fractions are: 1/2, 1/4, 1/3