154/990 = 7/45
220/990 = 2/9
.99 * * * * * That is the decimal equivalent. The simplified ratio for 990/1000 is 99/100
3/5 is simplified by 33/55
The LCM is 990.
0.0556
55/72
no
No.
It is 11/12 when simplified (divide both the 55 and 60 by 5).
55/11 = 5
18/55 is in its simplest form