simple interest
fractional percent to decimal
percentage
percent
rate of income
100

simple interest formula

i-prt

100

2 1/2%

.025

100

50% of 924

462

100

60 is what percent of 400

15%

100

monthly expenses: $700

Monthly income: $900

Price of house:  $70,000

3.4%

200

time in the simple interest formula must be in months/years?

years

200

3/4%

.0075

200

10% of 500

50

200

693 is what percent of 924

75%

200
annual expenses:  $5,100

annual income:  $14,400

Price of house:  $90,000

10.3%

300
principal = $1,100

rate = 1.25%

time = 2 years

interest = $27.50

300

12 4/5%

.128

300

40% of 2,100

840

300

identify the percent in this problem

12 is 10% of 120

10%

300

annual expenses:  $9,600

annual income:  $10,920

Price of house:  $90,000

1.47%

400

principal = $2,500

rate = 1/2%

time = 1 year

$12.50

400

2/3%

0.6...

400

identify the percentage in this problem

12 is 10% of 120

12

400

identify the base in this problem

12 is 10% of 120

120

400

The formula for finding the rate of income

(annual income - annual expenses)

divided by the price of the house


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