Percent and Decimals & Comparing/Ordering
Write the percent as a decimal:
57.4%
0.574
Write and solve a proportion:
What percent of 25 is 12?
12/25 = x/100
x = 48%
Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent if necessary.
12 inches to 36 inches
Increase
200%
Find the missing component:
Original Price = $80
Percent of Discount = 20%
Sale Price = ?
$64
An account earns simple interest.
a) Find the interest earned.
b) Find the balance of the account.
$600 at 5% for 2 years
a) $60
b) $660
Write the decimal as a percent:
5.12
512%
Write and solve a proportion:
25% of what number is 9?
25/100 = 9/x
x = 36
Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent if necessary.
50 pounds to 35 pounds
Decrease
30%
Find the missing component:
Original Price = ?
Percent of Discount = 25%
Sale Price = $40
$53.33
An account earns simple interest.
a) Find the interest earned.
b) Find the balance of the account.
$1800 at 6.5% for 30 months
a) $292.50
b) $2092.50
Write the percent as a decimal:
0.5%
0.005
Write and solve a proportion:
75% of 124 is what number?
75/100 = x/124
x = 93
Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent if necessary.
10 gallons to 24 gallons
Increase
140%
Find the missing component:
Original Price = $60
Percent of Discount = ?
Sale Price = $45
25%
Find the annual interest rate:
I=$24, P=$400, t=2 years
3%
Order the numbers from least to greatest:
43/50, 0.91, 7/8, 84%
84%, 43/50, 7/8, 0.91
0.84, 0.86, 0.875, 0.91
Write and solve an equation:
35% of what number is 35?
35 = 0.35 * x
x = 100
Describe and correct the error in finding the percent increase from 18 to 26.
(26 - 18) / 26 = 0.31 = 31%
The denominator should be 18, which is the original amount.
(26 - 18) / 18 = 0.44 = 44%
Find the selling price:
Cost to store = $50
Markup = 10%
$55
Find the amount of time:
I=$30, P=$500, r=3%
2 years
You answered 21 out of 25 questions correctly on a test. Did you reach your goal of getting at least 80%? Explain.
Yes, 21/25 = 84% which is greater than 80%.
Write and solve an equation:
29 is what percent of 20?
29 = x * 20
x = 145%
You estimate that a baby pig weighs 20 pounds. The actual weight of the baby pig is 16 pounds. Find the percent error.
25%
Find the selling price:
Cost to store = $140
Markup = 25%
$175
Find the amount paid for the loan.
$1500 at 9% for 2 years
$1770