SOLUTION: A bookstore had 98 copies of a magazine. Yesterday, it sold 2/7 of them. Today, it sold 4/7 of what remained. How many copies does the bookstore have left?

Question 1082074: A bookstore had 98 copies of a magazine. Yesterday, it sold 2/7 of them. Today, it sold 4/7 of what remained. How many copies does the bookstore have left?
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
After the first day there were 5/7 of the original number remaining: 70
After the 2nd day there were 3/7 remaining from the number the 2nd day started with (which is the same number as we ended with AFTER the first day): 70*3/7 = 30
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Or, we can combine everything into one calculation:

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