27:9 .
'9' is a common factor , so divide by '9'
Hence
3:1
Mathemetically it is written as
27:9 :: 3:1
NB Note the use of 'colons'.
Chat with our AI personalities
8 for every 18
It is: 2 to 9
4 to 3
14 to 18
Multiply both the numbers (4 and 9) by any non-zero integer. You will have an equivalent ratio.