Formulas & Conversions
Write 234% as a decimal.
2.34
Muhamad invested $4000 into an account earning interest compounded monthly. If the interest rate was 2.2% and he left the money invested for 7 years, how much money does he have in total at the end of the 7 years?
Compound Interest
What is 15% of 250?
What is the 20% down payment on a $450,000 home?
$90,000
Find the 18% tip on a meal that cost $52.99.
$9.54
Simple Interest
I = PRT
Bernard invests $25 weekly into an account earning 1.35% interest compounded weekly for 2 years. How much is in the account after after 2 years?
Annuity
What is 300% of 720?
2160
What is the monthly payment on a $450,000 home after making a 20% down payment, with a 15 year mortgage at 7.5% interest?
$3337.24
The price of a car increased from $26,500 to $28,480. What is the percent increase, rounded to the nearest tenth of a percent?
7.5%
Total Amount
A = P + I
Charlotte wants to save up $16,000 for two years of community college tuition. How much does she need to invest each month if she can earn 2.7% interest compounded monthly, and she has 4 years to save?
Annuity (Sinking Fund)
65 is what percent of 200?
32.5%
How much of the first mortgage payment goes toward the principal?
$1,087.24
What is the missing leg length of a right triangle whose given leg is 3 feet and whose hypotenuse is 12 feet? (Round to the nearest tenth of a foot.)
11.6 feet
Write 85% as a reduced fraction.
17/20
Arno wants to have $6000 in an account in 3 years to replace his car with a new (used) car. In order to reach his goal, how much must he invest now into an account that has an interest rate of 3.1% compounded weekly?
Compound Interest (Present Value)
18 is what percent of 75?
24%
How much is paid for the home in total?
$690,703.20
Andres invests $300 into an account paying simple interest for 2 years at a rate of 2.8%. How much is in the account after 2 years?
$316.80
Percent Change
(new - old) / old * 100
Marianna wants to buy an RV in 10 years when she retires. If she saves monthly, how much does she need to invest each month into an account earning 1.8% interest compounded monthly.
Annuity (Sinking Fund)
12 is 60% of what number?
20
How much interest is paid on the mortgage over the 15 year period?
$240,703.20
Find the area of a circle with diameter 5 inches. Round to the nearest tenth and include the correct unit.
19.6 square inches