No, it is not equivalent.
Think of it this way. If you had £12 and I had £5 then you would have money in the ratio of 12 to 5 compared to me. If you then only had £5 and I had £17 (which represents the new ratio of 5 to 17) you would not agree that this was equivalent as a proportion (you would rightly feel that you had lost out)!
6 to 5
It is: 12/20 = 3/5
Don't you mean 17 on a 24 hour clock? That refers to (17-12)= 5:00PM
There cannot be a common ratio for only one number.
Find an equivalent ratio to 3/5.
17/5 or 34/10 or anything equivalent
A ratio is equivalent to 12 to 10 when both numbers can be divided by the same factor to simplify the ratio. In this case, both 12 and 10 can be divided by 2 to get 6 and 5 respectively. Therefore, the equivalent ratio to 12 to 10 is 6 to 5. This means that for every 6 of one quantity, there are 5 of the other quantity.
6 to 5
12 to 10
It is: 12/20 = 3/5
If you mean 30/12 then it is 5/2 in its simplest form
Don't you mean 17 on a 24 hour clock? That refers to (17-12)= 5:00PM
To convert inches to feet, you use the ratio 1 foot = 12 inches. To convert 17 inches to feet, divide 17 by 12. This would be 1 foot and 5 inches.
If x:y is a ratio and p is any non-zero number, then p*x:p*y is an equivalent ratio.
There cannot be a common ratio for only one number.
There are infinitely many equivalent ratios to 15:5, eg 12:4, 30:10, 45:15, 60:20 The simplest form of the ratio is 15:5 = (3×5):(1×5) = 3:1
Equivalent ratios to 4/5 can be several such as 8/10 or 16/20.