The fraction of the blue T-shirts that are on sale and are size medium are 1/7.
<h3>What is fraction ?</h3>
A fraction is used to represent the portion/part of the whole thing. It represents the equal parts of the whole. A fraction has two parts, namely numerator and denominator. The number on the top is called the numerator, and the number on the bottom is called the denominator.
Of all the shirts in the shop , 2/3 of the t-shirts are blue.
Of the blue shirts, 3/7 are on sale.
= 2/3 x 3/7
= 2/7
Out of all the shirts, 2/7 shirts are blue and are on sale.
Of the blue shirts on sale, 1/2 are size medium.
= 2/7 x 1/2
= 1/7
The fraction of the blue T-shirts that are on sale and are size medium are 1/7.
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