Question 1206724
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A deli is offering a special for its sandwiches. A customer will receive three free sandwiches 
for every five sandwiches purchased. Jane ordered 619 sandwiches for an office party at a large company. 
How many sandwiches did Jane have to pay for?
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Divide 619 by (3+5) = 8 :  619:8 = 77*8 + 3.


For each group of 8 sandwiches, Jane pays for only 5; the rest 3 of this group she gets for free.


So, Jane pays for 5*77 + 3 = 388 sandwiches, only.
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Solved.