A department store buys 100 shirts at a cost of $1,800 and sells them at a selling price of $20 each. Find the percent markup.

10%

Step-by-step explanation:

100 shirts at a cost of ​$1,800

1 shirt is $1800/100=$18

1 shirt is $18

and sells them at a selling price of ​$20 each

1 shirt costs $20

Find the percent markup.

20-18=2 2/20=1/10

step-by-step explanation:

12475909

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this