Astore is having a buy one, get one 50% off sale. if jen buys two shirts that each cost $12, how much would she have to payin all (disregarding sales tax). how many shirts are going to be discounted one or both?

From the given question we know that 21% = 63 cans
Now it is important to find out the number of cans that will make 1%
Then
21% = 63 cans
so
1% = (63/21) cans
      = 3 cans.
Now we have to find out the number of cans in 46%
We know
1% = 3 cans
so
46% = (3 * 46) cans
        = 138 cans
We also have to find the number of cans in 33%
So
33% = (3 * 33) cans
         = 99 cans