0.21 as a Fraction
What is 0.21 as a Fraction ?
0.21 as a fraction can be calculated as follows below.
0.21 as a fraction = ^{21}/_{100}.
21/100 is a proper fraction and so cannot be converted to mixed Fraction.
Fraction converter

Fractions types
There are two types of fractions, proper and improper fractions. Proper fractions are simple fractions with a numerator and denominator only, while improper fractions are also called mixed fractions. it has a whole number, a denominator and numerator.
Fraction operations
There are four operations that can be performed on fractions, they are Addition, subtraction, Division, multiplication.
Addition: Addtion operations are carried out by adding two fractions together, eg a/b + C/d
Division: Division operations are performed by dividing one fraction by another, eg a/b ÷ c/d
Multiplication: Multiplication operation is performed by multiply two fractional values, eg a/b X c/d
Subtraction: Subtraction is performed by subtracting one fraction from another. eg a/c  i/j
Numerator / Denominator
Numerator: We call the top number the Numerator, it is the number at the top of the fraction you have.
Denominator: We call the bottom number the Denominator, it is the whole number that is at the bottom, it is the number that is divided into.
Fraction to decimal conversion steps
Step 1: Find a number you can multiply by the bottom of the fraction to make it 10, or 100, or 1000, or any 1 followed by 0s.
Step 2: Multiply both the top and bottom by that number you choose.
Step 3. Then write down just the top number, putting the decimal point in the correct spot, that is one space from the right hand side for every zero in the bottom number.
This fraction calculator can also be used as fraction to percent, shopping discounts, coupon off, body fat, gross profit, weight loss, love, tax, population increase & decrease, sales profit. Once you know the values, to determine the % is easy .
Number system. Number system in mathematics is arranged so that 2(two) is the smallest even prime number. it is the only prime number which is followed by another prime 3 (three). All even numbers and integers are divisible by 2. Two is the 3rd number of the Fibonacci sequence. Gottfried Wilhelm Leibniz discovered the dual counting system (binary system) that uses only two digits to represent numbers. This helped in the development of digital technology for a proliferation. Because of this, it is the best known and most important number system in addition to the commonly used decimal system.
Zero Digit. The digit zero is the number of elements in an empty collection of objects. Mathematically the cardinality of the empty set Zero depends on the context of other variously defined objects. but this can be identified with others that are of the same object, which combines several properties compatible with each other. As cardinal numbers, that is number of elements in a set, are identified with special ordinals, the zero digit is just the smallest cardinal number. zero is elected as the first ordinal. As finite cardinal and ordinal it is depending on the definition often counted among the natural numbers. The zero digit is the identity element for addition in many couting sytem, such as the rational numbers, complex numbers, and real numbers, and a common name for a neutral element in many algebraic process, even if other elements are not identified with common numbers. Zero value is the only real number that is neither positive nor negative.
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