Question

The ratio of red counters to blue counters is 1:3

How many more red counters do you
need to add to make the ratio of red to blue 4:1?

Answer 1

If you add 11 more to the 1 red you would have 12red to the original 3 blue which is a ratio of 4 to 1. 12/3 = 4/1.

Hope my explanation helps you. Have a nice day.

Answer 2

It depends on how many counters you have in the first place. But if there is 1 red counter and 3 blue counters then you would need 11 more red counters