the last week of a month a car dealership sold 12 cars.A new sale promotion came out the first week of the month and sold 19 cars that week what was the percent increase in sale from the last week of the previous month compared to the first week of the next month

(19 - 12)/12 = ?

58%

To calculate the percentage increase in sales, we need to find the difference between the number of cars sold in the first week of the month and the last week of the previous month. Then, we divide this difference by the number of cars sold in the last week of the previous month and multiply by 100 to get the percentage.

First, let's find the difference:
Number of cars sold in the first week of the month = 19
Number of cars sold in the last week of the previous month = 12

Difference = 19 - 12 = 7

Next, let's calculate the percentage increase:
Percentage increase = (Difference / Number of cars sold in the last week of the previous month) * 100
Percentage increase = (7 / 12) * 100

Now, we can calculate the percentage:
Percentage increase ≈ 58.33%

Therefore, the percent increase in sales from the last week of the previous month to the first week of the next month is approximately 58.33%.