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Subtraction of a rational number means we are adding the additive inverse of the number to be subtracted to the other number. If and are two rational numbers, then subtracting from means adding additive inverse (negative) of to .
The subtraction of from is written as
Thus, we have:
Illustration: Subtract from
Solution: The additive inverse of is .
Next step will be to convert them into rational numbers with same denominator. For this we will find the LCM of denominator and convert them into equivalent numbers with same denominator
LCM of 6 and 4 is 12, So