Calculate Discounts
Estimation & Mental Math
Calculating Monthly Payments
Total Car Costs
100

A jacket is on sale for 20% off its $80 tag price. How much is the discount?

What is $16?

100

Estimate mentally: 18% of $60 (give a quick mental estimate and the exact answer).

What is $12?

Exact: $10.8

100

The annual cost for borrowing money.

What is the APR (Annual Percentage Rate)?

100

List at least five categories (besides loan payments) that contribute to the total cost of owning a car.

What are the taxes, title, tag, registration, and price?

200

An electronic gadget has a list price of $399 and is discounted by 15% with an additional $20 off at checkout. What is the final price? Round to nearest cent.

What is $319.15?

200

Quickly estimate a 15% tip on a $36.50 bill using a mental shortcut, then compute the exact tip. Round to the nearest cent.

What is $5.45?

Exact: $5.48

200

For a small loan of $5,000 at 6% APR for 2 years (monthly payments), compute the monthly payment using the loan amortization formula. Round to the nearest cent.

What is $221.60?

200

If a car costs $21,000 and you finance $18,000 over 48 months at 3.5% APR, estimate the monthly payment (approximate using a calculator) and compute the total paid for the financed portion. Round to the nearest cent.

What is $400.00?

Total: $19,295.07 -- Finance Charge: $1,295.07

300

A store offers "Buy one, get the second at 50% off" on an item priced $120. If a customer buys two, what is the average price per item? Round to nearest cent.

What is $90?

300

You buy groceries totaling $73.89. Estimate the total after applying a 6.25% tax using rounding strategies, then compute the exact total. Round to nearest cent.

What is $78.00 - $79.00?

Exact: $78.51

300

A $12,000 auto loan with 4.5% APR is taken for 60 months. Compute the monthly payment.

Compute the total amount paid over the life of the loan. Round to the nearest cent.

What is $204.61?

Total: $12,276.52

300

Consider two financing offers for the same car price: Offer A — $20,000 at 3.0% APR for 60 months; Offer B — $20,000 at 2.5% APR for 72 months. Compute monthly payments and total paid for both offers; state which is cheaper overall in total dollars paid. Round to the nearest cent.

FREE MONEY!!!

400

A seasonal clearance offers an item at 40% off, then an additional 10% off the new price. If the original price is $250, compute the final price. 

Compute the total percent off the original price (round percent to the nearest tenth).

What is $135.00?

Total Discount: 46.0%

400

Estimate the final price of a $249 item after a 12% discount using mental math techniques. Then compute the exact final price. Round to nearest cent.

What is $220.00?

Exact: $219.12

400

A borrower wants a monthly payment under $350 on a $18,000 loan with 5% APR over 60 months. Determine whether this is possible; if not, find the minimum term (in months) required to get payments under $350 assuming the same APR (round up to the next whole month).

FREE MONEY!!!

500

During a sale, a customer stacks three successive discounts: 20%, then 15%, then 10% on a $1,200 item. Compute the final price.

Compute the overall effective percent discount from the original price. Round money to the nearest cent and percent to the nearest hundredth.

What is $734.40?

Total Discount: 38.8%

500

Using mental estimation, determine whether a 9% increase on $5,480 will yield an increase closer to $490 or $520. Then compute the exact increase and state rounded to the nearest dollar.

What is $490.00?

Exact: $493.20

500

A loan of $25,000 at 3.75% APR is amortized over 72 months. Compute the monthly payment. 

Compute the total finance charge (total interest paid). Round currency to the nearest cent.

What is $457.60?

Total Finance Charge: $7,947.20

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