What is 2/5 + 7/9 + 2/3 as a fraction?

Question

tkhunny · Answer

Find a common denominator!  I'm thinking 45.  Can you prove it?

anonymous · Answer

Yes I found the common denominator. But the answer I got wasn't any of the multiple choice answers.

tkhunny · Answer

Please show your work.  Let's see if you wandered off or the answer key.

anonymous · Answer

Well I got 18/ 45 + 35/45 + 30/ 45 and I added them all up and I don't know how to get it to a fraction.

tkhunny · Answer

Seems okay.  What's wrong with (18+35+30)/45 = 83/45?

anonymous · Answer

add the numerators together. when adding fractions the denominator does not increase if it is a "common denominator."

anonymous · Answer

Well because 83 /45 wasn't one of the answer options.

anonymous · Answer

The answer options are 1 38/45,   14 11/17,    11/ 17   or 11/135.

anonymous · Answer

wolfram alpha will provide you a detailed solution to this type of problem, if you need a more immediate response in the future...

anonymous · Answer

Okay thank you

anonymous · Answer

1 and 38/45 is the reduced answer for this problem

anonymous · Answer

83 divided by 45 yields 1 remainder 38