Question

A bookstore sold 18,000 paperbacks one month. This was 10% less than the number of paperbacks the store sold the previous month. The following equation represents this situation, where x represents the number of paperbacks sold the previous month.

x - 0.1x = 18,000

How many paperbacks did the store sell in both months combined?

Answer 1

i keep doing 18,000 * 0.1 and getting 1,800. Then subtracting 1,800 from 18,000, getting 16,200. Then with 18,000 + 16,200 = 34,200? But that's not one of the possible answers?

Answer 2

18000/.9 should work.

Answer 3

So the answer is 20,000?

Answer 4

90 % of $ 20,000 is $ 18,000. 1% would be $ 20,000 / 100, right? 1% = $ 200. 90% would be 90 times $ 200. It's always easy to find 1% quickly; just divide by 100. The you can calculate any other % you want by simple multiplication.

Answer 5

Great thanks so much!