﻿ Fraction & Factors calculator
 Common factors calculator ▲
Input Number Factors
Common Factors
Greatest Common Factor
Least Common Multiple

Prime factors
Input Array (each number divided by comma)
 Smallest Common Factor Least Common Multiple
Fraction Calculator
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NOTE: If the numerator was entered without the denominator it is treated as integer.
If the numerator was not entered and the denominator entered than calculation not performed.
Fraction and Decimal Calculator
= Definition Example Addition and subtraction of two fractions  Multiplication of two fractions  Division of two fractions  Proper fraction numerator < denominator Improper fraction numerator > denominator Mixed fraction Integer and fraction Mixed to improper fraction  Improper to mixed fraction  For an easy way to find the least common multiple of an array e.g.    8,  6,  42,   16,  32    follow the next steps:
Divide each term of the array (gray column) by 2 see green row at top of the table, if the array item is not divisible by 2 write the number as is. Continue the process until all numbers that can be divided by 2 are 1, then start dividing by 3 and then by the next prime number. At the end multiply all the divisors at the top of the table (green row) to get the least common multiple.
LCM = 2 • 2 • 2 • 2 • 2 • 3 • 7 = 672
 array Divideby: 2 Divideby: 2 Divideby: 2 Divideby: 2 Divideby: 2 Divideby: 3 Divideby: 7 8 4 2 1 1 1 1 1 6 3 3 3 3 3 1 1 42 21 21 21 21 21 7 1 16 8 4 2 1 1 1 1 32 16 8 4 2 1 1 1
Example 1: find the LCM of the array   14,   5,   25.

Solution:       LCM = 2, • 5, • 5, • 7 = 350
 array Divideby: 2 Divideby: 5 Divideby: 5 Divideby: 7 14 7 7 7 1 5 5 1 1 1 25 25 5 1 1
Example 2: find the LCM of the array
72,   12,   3   21,   112.

Solution:
LCM = 2,• 2,• 2,• 2,• 3,• 3,• 7 = 1008
 array Divideby: 2 Divideby: 2 Divideby: 2 Divideby: 2 Divideby: 3 Divideby: 3 Divideby: 7 72 36 18 9 9 3 1 1 12 6 3 3 3 1 1 1 3 3 3 3 3 1 1 1 21 21 21 21 21 7 7 1 112 56 28 14 7 7 7 1