1/18
It is: 9/10
9/10 180/200=18/20=9/10 :)
180/110 = 18 x 10/11 x 10 = 18/11 = 17/11
180 over 100 is the same as 18 over 10 which is the same as 9 over 5 which is the same as 1 and 4 over 5 (1 and a four fifths) which is the same as 1.8
21/10 is in its simplest form.
63/10 is in its simplest form.
33/10 is in its simplest form.
10/21 is in its simplest form.
10/63 is the simplest form.
3/10 is the simplest form.
10/27 is in its simplest form.
7 over 10 is already a fraction in simplest form.