Please help me transpose We Wish You a Merry Christmas written in G to the same song in C.?

Question

G: A G
C: ? ?

My music theory is weak so Ido not know if this is the right approach. But for the song We Wish You a Merry Christmas, I have a copy written in G. I want to transpose it to C for the notes shown by the ? marks above. The corresponding notes for the song written in G are shown next to G. Can you please help?

Answer 1

In the key of C:

G C C D C B A A
We wish you a Mer-ry Christ-mas
A D D E D C B G
We wish you a Mer-ry Christ-mas
G E E F E D C A
We wish you a Mer-ry Christ-mas
G G A D B C
And a Hap-py New Year

Enjoy!