16:36
We note that '4' is common factor of both numbers.
So cancel down by '4'/
Hence
4:9
Overall it is written as
16:36 :: 4:9
Note the use of colons to delimeate 'ratio'.
It is: 9 to 4
It is: 9 to 16
They are: 8 to 18 and 16 to 36
The ratio 1:36 = 0.0277...
36 out of 100
It is 36/1.
The ratio is 4:5
36
36/74 = 18/37
The ratio is 2:1 !
The ratio of 144 to 100 is 36:25
It is 36/100