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
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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
arr Divide
by: 2
Divide
by: 2
Divide
by: 2
Divide
by: 2
Divide
by: 2
Divide
by: 3
Divide
by: 7
84211111
63333311
42212121212171
168421111
3216842111
Example 1: find the LCM of the array   14,   5,   25.


Solution:       LCM = 2, • 5, • 5, • 7 = 350
arrDivide
by: 2
Divide
by: 5
Divide
by: 5
Divide
by: 7
147771
55111
2525511
Example 2: find the LCM of the array
  72,   12,   3   21,   112.


Solution:
      LCM = 2,• 2,• 2,• 2,• 3,• 3,• 7 = 1008
arr Divide
by: 2
Divide
by: 2
Divide
by: 2
Divide
by: 2
Divide
by: 3
Divide
by: 3
Divide
by: 7
72361899311
126333111
33333111
2121212121771
1125628147771