Usually the store sells 75 breakfast sandwiches each week.
Now, during the promotion the target is to increase the sale by 20%.
Now, lets calculate 20% of 75 first. For that we need to use the following formula:
a% of b = [tex]\frac{a}{100} \times b[/tex]
Using the formula above, we get:
20% of 75 = [tex]\frac{20}{100} \times 75=15[/tex]
So, we need 15 more sandwiches for the week of promotion:
So, 15 ADDITIONAL breakfast sandwiches must be sold in order to meet the sales increased goal.
