4*5 + 7*9= 20+63=83.
13 over 9
It is seven ninths.
20/45 + 18/45 = 38/45
3/5 + 7/9 = 27/45 + 35/45 = 62/45
2
seven and two fifths
63
4/9 + 7/8 = 95/72
Four ninths
It is eight ninths.
2/9 + 4/510/45 + 36/4546/45 or 1 1/45
4/9 plus 7/15 = 41/45 in its simplest form