Percent of Change and Simple Interest Review

Find Simple Interest

100

$1300 at 6% for 7 years

$546

200

$1900 at 5.5% for 36 months

$313.50

300

$550 at 5.75% for 4 years

$126.50

400

Find the balance.

$1,986 at 8% for 36 months

$2,462.64

500

Find the total amount paid.

$9500 at 3.3% for 30 months

$10,283.75

Percent of Change

100

From 5 dogs to 8 dogs

60% increase

200

From 300 grams to 240 grams

20% decrease

300

From 20 tons to 99 tons

395% increase

400

From 362 feet to 156 feet

57% decrease

500

From $45.00 to $130.00

189% increase

Compound Interest

100

Find the balance

$1,000 at 5% for 4 years compounded annually.

$1,215.50

200

Find the balance

$2,200 at 5% for 2 years

compounded annually

$2,425.50

300

Find the balance

$1,111 at 11% for 11 years

compounded annually

$3,501.60

400

Find just the interest accrued

$1,986 at 8% for 36 months

compounded annually

$515.79

500

Find the interest

$9500 at 3.3% for 30 months

compounded annually

$803.25

Potpourri

100

Change to a decimal.

1.5%

0.015

200

Change to a percent.

0.00821

0.821%

300

Round 56.98723 to the nearest thousandth

56.987

400

46 is 66% of what number?

69.7

500

What percent of 163 is 57?

35%

Tips and taxes

100

What is the TOTAL price

$34 shoes with a 7% tax

$36.38

200

Find the tip.

$75.20 bill. You tip 18%.

$13.54

300

Find the new price.

$65 dress marked down 20%.

$52

400

Find the total you pay (tip based on pre-tax)

Subtotal: $40

Tax: 7%

Tip: 20%

$50.80

500

Find the total you pay (tip based on pre-tax)

Subtotal: $56

Tax: 7%

Tip: 15%

$68.32