I think it is 1 I am not sure tho
Number of shirts a department store bought = 200
Cost price of 200 shirts = $5400
Cost price of 1 shirt :


Thus, the cost price of one shirt = $27
Price at which the department store sold each shirt = $30
Which means :
▪︎Cost price of shirt = $27
▪︎Selling price of shrit = $30
Since selling price is greater than cost price, there was a markup in the price of the shirts.
We know that :

Markup percentage in the price of the shirts :





Thus, the percentage of markup = 
Therefore, the percentage of markup in the shirt's price = 
In order to find this out, we just needed to find out which one has the same smallest fraction
25 / 35. Divided this by 5 and we will get 5/7 >>> smallest fraction
15/21 . Divided this by 3 and we also will get 5/7 >> smallest fraction
So the answer would be : B. 15/21
hope this helps
The answers are A, C and F