This can be written as 12 over 3, i.e. 12/3 which can be simplified to 4/1.
Ratios can also be written as two numbers separated by a colon.
12/3 can thus be expressed as 12 : 3 which again can be simplified to 4 : 1
10 out of 12 is 83 and 1/3%
3 to 4
Yes.
12/20 = 3/5
9/12 = 3/4
It is 1/3
12/4 = 3/1 = 3.
7/12
2/3
If our ratio was 3:4. Then we would write it as 3/4. Formula A:B = A/B.
You must have seen expressions such as 3:4::12:16, which reads 3 is to 4 as 12 is to 16. Sometimes encountered as 5:a::30:b, which is read 5 is to a as 30 is to b. Is this the type of ratio to which you refer.
12 over 28 in simplest form is 3 over 7.