A farmer has 120 bushels of con for sale at a​ farmer's market. He sells an average of 15&5/8

bushels each day. After 7 ​days, what is the change in the total number of bushels the farmer has for sale at the​ farmer's market?
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To find the change in the total number of bushels the farmer has for sale at the farmer's market, we need to calculate the total number of bushels he sells in 7 days.

The average number of bushels the farmer sells each day is 15 5/8. This can be converted to an improper fraction by multiplying the whole number 15 by the denominator 8 and adding the numerator 5. We then add the fraction 5/8.

15 * 8 + 5 = 125
125/8 = 15 5/8

To find the total number of bushels sold in 7 days, we multiply the average number of bushels sold per day by the number of days:

(15 5/8) * 7 = 7 * 15 5/8 = 109 1/8

Therefore, the farmer sells a total of 109 1/8 bushels in 7 days.

To find the change in the total number of bushels the farmer has for sale at the farmer's market, we subtract the total number of bushels sold from the initial amount.

120 - (109 1/8) = 120 - 109 1/8

To subtract fractions, we need to find a common denominator. In this case, that would be 8.

(120 * 8) - (109 * 8 + 1) / 8 = 960 - (872 + 1) / 8 = 960 - 873/8

Now, we subtract the numerators:

960 - 873 = 87

Therefore, the change in the total number of bushels the farmer has for sale at the farmer's market after 7 days is 87 units.