With the stars (*) next 2 the #'s are my answers! ! !
1) Find the percent of increase. ~ 50 to 70
20%
30%
40% *****
50%
2) Find the percent of decrease. Round your answer to the nearest tenth of a percent where necessary. ~ 75 to 60
20%
30%
40%
50% ******
3) Find the percent markup. Round to the nearest whole percent.
Store's Cost: $100
Selling Price: $160
50%
60%
70% *****
80%
4) Find the sale price. Round to the nearest cent.
Regular Price: $57.63
Percent of Discount: 10%
$63.39
$5.76
$51.87 *****
$57.53
5) Find the sale price. Round to the nearest cent.
Regular Price: $56
Percent of Discount: 40%
$50.00
$22.40
$40.00
$33.60 *****
6) Find the interest earned by an account with $1,200 of simple interest of 4% for 3 years.
$144
$244
$44
$88 *****
2, 3, and 6 are wrong.
The others are right.
2) 40%
3)60%
6)$44
? ? ? ? ?
2. 15/75 = 0.2 = 20%
3. Right.
6. Interest = principal * rate * time
To find the correct answers to the questions, follow these steps:
1) Find the percent increase:
To find the percent increase, subtract the initial number from the final number, divide the result by the initial number, and multiply by 100. In this case, the initial number is 50 and the final number is 70. So, the percent increase is ((70 - 50) / 50) * 100 = 40%. Therefore, the correct answer is 40%.
2) Find the percent decrease:
To find the percent decrease, subtract the final number from the initial number, divide the result by the initial number, and multiply by 100. In this case, the initial number is 75 and the final number is 60. So, the percent decrease is ((75 - 60) / 75) * 100 = 20%. Therefore, the correct answer is 20%.
3) Find the percent markup:
To find the percent markup, subtract the store's cost from the selling price, divide the result by the store's cost, and multiply by 100. In this case, the store's cost is $100 and the selling price is $160. So, the percent markup is (($160 - $100) / $100) * 100 = 60%. Therefore, the correct answer is 60%.
4) Find the sale price:
To find the sale price, multiply the regular price by (1 - the percentage of discount). In this case, the regular price is $57.63 and the percentage of discount is 10%. So, the sale price is $57.63 * (1 - 0.10) = $51.87. Therefore, the correct answer is $51.87.
5) Find the sale price:
To find the sale price, multiply the regular price by (1 - the percentage of discount). In this case, the regular price is $56 and the percentage of discount is 40%. So, the sale price is $56 * (1 - 0.40) = $33.60. Therefore, the correct answer is $33.60.
6) Find the interest earned:
To find the interest earned, multiply the principal amount (initial amount/investment) by the interest rate and the number of years. In this case, the principal amount is $1,200, the interest rate is 4%, and the number of years is 3. So, the interest earned is $1,200 * 0.04 * 3 = $144. Therefore, the correct answer is $144.