Question

What number should be added to get
$\frac{7}{12} to \: get \frac{4}{15}$
​

Answer 1

Answer :

• -19/60 should be added to 7/12 to 4/15.

To find :

• What number should be added to 7/12 to get 4/15

Solution :

• Let the number be x

Now, A number should be added to 7/12 to 4/15 so,

According to this,

》x + 7/12 = 4/15

》x = 4/15 - 7/12

Now , we have to take LCM of 15 and 20 we Get,

• LCM of 15 and 20 = 60

》x = 4/15 - 7/12

》x = 16 - 35 / 60

》x = -19/60

Hence , -19/60 should be added to 7/12 to 4/15.

More Explanation :

• LCM is the least common multiple
• HCF is the highest common factor
• LCM is nothing but a multiple of two other number and also a smallest number
• Example : Multiple of 2 are 2,4,6,8,5,12,14,16,18,20
• Multiple of 3 are 3,6,9,12,15,18,21,27,30
• So , Least common multiple of 2 and 3 are 6 , 12 and 18
• Formula of HCF and LCM are Product of two numbers = HCF of two numbers × LCM of the two numbers