Question

If you want to find the difference of 6/25 - 4/5 what common denominator should you choose? why?

Answer 1

You should always choose the LCM is a common denominator

LCM(5,25)=25

the first fraction already has 25 as its denominator

the second fraction we must multiply by 5 above and below

so

6/25-4*5/5*5

6/25-20/25 =

-14/25

Answer 2

you should always choose the LCM is a common denominator
LCM(5,25)=25
the first fraction already has 25 as its denominator
the second fraction we must multiply by 5 above and below
so
6/25-4*5/5*5
6/25-20/25 =
-14/25