How do I get 1/128 + 1/64 into the lowest term fraction

Question

What are the steps to making 1/128 + 1/64 into the lowest term?

Answer 1

We need to add the fractions, but the fractions have different denominators.  We need to find the lowest common denominator (LCD) of the fractions.  LCD is 128.

 

Multiply the numerator and the denominator of the second fraction by 2.

 

(1 / 128) + (2 / 128)

 

 

Now we can add the fractions.  We get

 

3 / 128

 

This fraction cannot be reduced because there are no factors that 3 and 128 have in common other than 1.