Know Least Common Multiple of fractions 12/40, 20/45, 28/48, 36/90 quickly i.e. 1260 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 12/40, 20/45, 28/48, 36/90 is **1260**.

LCM(12/40, 20/45, 28/48, 36/90) = 1260

Enter two or more fractions separated by **"commas"**

Ex: 2/3, 5/7 or 3/5, 5/9, 7/3

Given numbers are 12/40,20/45,28/48,36/90

Formula to find LCM of Fractions is

LCM = LCM of Numerators/GCF of Denominators

As per the formula LCM of Fractions let’s split into two parts and find the LCM of Numerators and GCF of Denominators

In the given fractions LCM of Numerators means LCM of 12,20,28,36

Least Common Multiple of Numerators i.e. LCM of 12,20,28,36 is 1260.

GCF of Denominators means GCF of 40,45,48,90 as per the given fractions.

GCF of 40,45,48,90 is 1 as it is the largest common factor for these numbers.

Lets's calculate LCM of 12,20,28,36

2 | 12, 20, 28, 36 |

2 | 6, 10, 14, 18 |

3 | 3, 5, 7, 9 |

1, 5, 7, 3 |

∴ So the LCM of the given numbers is 2 x 2 x 3 x 1 x 5 x 7 x 3 = 1260

The formula of **LCM** is LCM(a_{1},a_{2},a_{3}....,a_{n}) = ( a_{1} × a_{2} × a_{3} × .... × a_{n}) / GCF(a_{1},a_{2},a_{3}....,a_{n}) x common factors(if more than 2 numbers have common factors).

We need to calculate greatest common factor of 12,20,28,36 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(12,20,28,36) = 4

common factors(in case of two or more numbers have common factors) = 48

GCF(12,20,28,36) x common factors =4 x 48 = 192

LCM(12,20,28,36) = ( 12 × 20 × 28 × 36 ) / 192

LCM(12,20,28,36) = 241920 / 192

LCM(12,20,28,36) = 1260

Lets's calculate GCF of 40,45,48,90

∴ So GCF of numbers is 1 because of no common factors present between them.

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 1260/1

Therefore the LCM of Fractions 12/40,20/45,28/48,36/90 is 1260

**Factors of 40**

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

**Factors of 45**

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

**Factors of 48**

List of positive integer factors of 48 that divides 48 without a remainder.

1,2,3,4,6,8,12,16,24,48

**Factors of 90**

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

**Greatest Common Factor**

We found the factors 40,45,48,90 . The biggest common factor number is the **GCF** number.

So the **greatest common factor 40,45,48,90 ** is **1**.

Here are some samples of LCM of Fractions calculations.

1. How to find LCM in Fractions?

Answer: LCM of fractions can be found using the simple formula LCM of Fractions = LCM of Numerators/GCF of Denominators.

2. What is the LCM of Fractions for 12/40, 20/45, 28/48, 36/90?

Answer: LCM of Numerators as per given numbers 12/40, 20/45, 28/48, 36/90 is

LCM of Numerators i.e. for 12,20,28,36 is 1260

GCF of denominators i.e. for 40,45,48,90 is 1.

Thus, LCM of Fractions is 1260.Finally, LCM of Fractions for 12/40, 20/45, 28/48, 36/90 is 1260.