Answer:
The ratio of red to green counters is given as 3:5.
To express this ratio as a fraction, you can add the two parts (3 and 5) together to find the total number of parts in the ratio, and then use that total as the denominator of the fraction.
3 (red) + 5 (green) = 8
So, the total number of parts in the ratio is 8.
Now, you can express the red counters as a fraction of the total:
Red counters fraction = (Number of red counters) / (Total number of counters) = 3/8
Therefore, the fraction of red counters in the bag is 3/8.