Part 1
a. The sale price of the coat is $96.00, and the purchase price is $60.00. To find what percent of the purchase price the sale price is, you can use the formula:
\[ \text{Percent of Purchase Price} = \left( \frac{\text{Sale Price}}{\text{Purchase Price}} \right) \times 100 \]
Calculating it:
\[ \text{Percent of Purchase Price} = \left( \frac{96.00}{60.00} \right) \times 100 = 1.6 \times 100 = 160% \]
Thus, the sale price is 160% of the purchase price.
Part 2
b. The owner increased the sale price of the jackets by 160%. The purchase price of the jackets is $45. To calculate the new sale price:
\[ \text{Increased Sale Price} = \text{Purchase Price} + \left( \frac{160}{100} \times \text{Purchase Price} \right) = 45 + (1.6 \times 45) = 45 + 72 = 117 \]
Now, we want to find how many jackets must be sold to earn at least $250 in total sales:
Let \( n \) be the number of jackets sold:
\[ n \times \text{Increased Sale Price} \geq 250 \]
Substituting in the increased sale price we calculated:
\[ n \times 117 \geq 250 \]
Now, divide both sides by 117 to find \( n \):
\[ n \geq \frac{250}{117} \approx 2.14 \]
Since the owner can only sell whole jackets, we round up to the nearest whole number.
Thus, \( n = 3 \) jackets must be sold. So the owner must buy at least 3 jackets to sell at least $250.
Part 3
To explain the answer, after an increase of 160%, he sells the jackets for:
\[ \text{Selling Price} = 117 \]
To check this:
\[ \text{Selling Price} = \text{Purchase Price} + 160% \text{ of the Purchase Price} = 45 + 72 = 117 \]
Next, we need the total sales to be at least $250:
\[ 3 \text{ jackets} \times 117 = 351 \]
Since selling 3 jackets meets the requirement of at least $250 in total sales, he can sell these jackets at the price of $117 each to reach a total of $351 in sales.
So, he needs to sell at least 3 jackets to achieve at least $250 in sales.