The fraction of the T shirt sold that is medium is a / a + b
The company sells t-shirts in medium or large sizes.
One month the ratio of medium to large sold was a: b.
Therefore, one month the fraction of medium to large sold will be a / b
The fraction of the T shirt sold that is medium can be calculated as follows;
The fraction = amount of medium sold / sum of medium and large sold
The fraction is a / a + b
Therefore, the fraction of T shirts sold that are medium is a / a + b
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