However, rational numbers can be expressed as fractions, decimals, or percentages. It’s not at all obvious why 1/2, .5, and 50% all refer to the same quantity.

Rational numbers can be fractions of integers. Irrational numbers cannot be expressed as ratios. Decimal representations help identify them. Pi and Euler's number are irrational.

Numbers beyond Fractions We now learn in school that some values—the so-called irrational numbers—cannot be expressed as the ratio of two integers. But this realization is far from obvious.

Real numbers are, in fact, pretty much any number that you can think of. This can include whole numbers or integers, fractions, rational numbers and irrational numbers.

Many children and adults have difficulty gaining a comprehensive understanding of rational numbers. Although fractions are taught before decimals and percentages in many countries, including the USA, ...

Kathleen A. Cramer, Thomas R. Post, Robert C. delMas, Initial Fraction Learning by Fourth- and Fifth-Grade Students: A Comparison of the Effects of Using Commercial Curricula with the Effects of Using ...

Here’s how it works: First, split all the rational numbers into two sets, so that all of the fractions in one set are smaller than those in the other. For instance, in one group, collect all rationals ...

However, rational numbers can be expressed as fractions, decimals, or percentages. It’s not at all obvious why 1/2, .5, and 50% all refer to the same quantity.