you want to buy three books that are on sale at 20% off. the original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation With distribution. Calculation without distribution.
How do i do this with and without distribution?
($2.50 + $4.95 + $6.00) * 0.8 = ?
Subtract the original price from the sale price.
Then figure 0.2 * each individual price.
Thanks
To calculate the savings on the three books that are on sale at 20% off, you can use two different approaches: one with distribution (by multiplying each book's price by the discount) and one without distribution (by finding the total price before and after the discount and taking the difference).
Calculation with distribution:
To find the savings on each book individually, multiply each book's original price by the discount rate of 20% (or 0.20). Then, add up the savings of all three books.
Book 1:
Original price for Book 1: $2.50
Savings for Book 1: $2.50 * 0.20 = $0.50
Book 2:
Original price for Book 2: $4.95
Savings for Book 2: $4.95 * 0.20 = $0.99
Book 3:
Original price for Book 3: $6.00
Savings for Book 3: $6.00 * 0.20 = $1.20
Total savings: $0.50 + $0.99 + $1.20 = $2.69
Therefore, you will save $2.69 in total when buying the three books at a 20% discount.
Calculation without distribution:
Another way to calculate the savings on the three books is by finding the total price of the books before and after the discount. Then, take the difference between the two prices.
Total price before the discount: $2.50 + $4.95 + $6.00 = $13.45
Total price after the discount:
To calculate the discounted price for each book, multiply the original price by (1 - the discount rate of 20% or 0.20).
Book 1:
Discounted price for Book 1: $2.50 * (1 - 0.20) = $2.00
Book 2:
Discounted price for Book 2: $4.95 * (1 - 0.20) = $3.96
Book 3:
Discounted price for Book 3: $6.00 * (1 - 0.20) = $4.80
Total price after the discount: $2.00 + $3.96 + $4.80 = $10.76
Savings: Total price before the discount - Total price after the discount = $13.45 - $10.76 = $2.69
In both approaches, the savings on the three books will be $2.69.