4/5 + 2/9=a

4/5=36/45

2/9=10/45

10/45+36/45=46/45

46/45=1 1/45

Okay, let's do this step by step.

First, find the LCD of each.

4/5: 5, 10, 15, 20, 25, 30, 35, 49, 45

2/9: 9, 18, 27, 36, 45

It's 45! 45 is your new denominator.

Multiply the numerator of each fraction by the first denominator of the other.

4*9=36

2*5=10

This is the new numerator. So...

36/45+10/45=a

I think you should be able to figure out the rest. 

Very nice, Riddler and Anonymous4338....5 pts.....!!!!