4/9 = 20/n
4n = 9(20)
4n = 180
n = 45
9 over 20 equals 45%
9 over 20 equals 45 over 100
2/9+4/9=6/9, which equals 2/3
29
It equals 4 over 9. 4/9
9
The LCD for 3/20 and 9/4 is 20
4 & 5
(4/9) * (5/9) = 20/81
4/9 minus 3/4 equals -11/36
Depends what you mean;(9+20) / 4 = 7.25(29 divided by 4 equals 7.25)OR9 + (20/4) = 14(9, added to whatever you get from 20 divided by 4, which is the same as 9+5)
If: 1n/4 = 9 Then: n = 36