Looking for confirmation on the LCD of:

1/11 , 3/33 It's been years since I've done this...just trying to verify my answer. Thanks.

Question

Looking for confirmation on the LCD of:

1/11 , 3/33  It's been years since I've done this...just trying to verify my answer.  Thanks.

ash2326 · Answer

@GandalfIAm what did you get ?

anonymous · Answer

My answer is 11 because I "reduced" the fraction 3/33 to 1/11 and subsequently determined that since the 1/11 is also in reality equal to 3/33, then the LCD would be 11.
BTW, I'm just brushing up on skills that I haven't used since dinosaurs roamed the earth (pre-calculator) and in so doing, I was trying to recall some things that I used to know.  
So, am I right or am I way off base?  Would it then be 33?  Because that is the value of the denominator in the largest fraction?  I just thought that if memory serves me right, you always try to reduce first.

ash2326 · Answer

Yeah you're right the LCD is 1/11

anonymous · Answer

So, do you "always" reduce fractions to their lowest form first and then try to find the LCD?

phi · Answer

Here is a link http://www.helpwithfractions.com/least-common-denominator.html The LCD of 11 and 33 is 33 (we are ignoring the numerators here). I do not like questions like this, because it is tempting to first reduce the fraction, and then compare denominators.

anonymous · Answer

Ah, so I was wrong to reduce the fraction...thanks so much for explaining this to me...I couldn't remember as it's just been so long since I've done this...funny how you forget over the years.  I'll go check out the link that you so kindly provided.

Thanks for responding and clarifying things for me.

Much appreciated.  Wishing you a great weekend ahead.

phi · Answer

Except it isn't wrong to reduce the fraction.  Only for a test...