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 3 : 1?

Nov 20, 2016 · If we assume that initially Number of red counter is 1 Number of blue counter is 3 Now to make ratio reverse you need to add 8 more red counters so that ratio becomes 9:3=3:1