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10 Cards in this Set
- Front
- Back
proportion |
An equation that states that two ratios are equivalent. 2/3 = 4/6 |
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percent |
A ratio comparing a number to 100.
45% = 45/100 |
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percent of decrease |
A percent change describing a decrease in a
decrease is 2, 2/8 = 0.25 = 25%. |
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percent of increase |
A percent change describing an increase in a
increase is 4/8 = 0.5 = 50%. |
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principal |
The initial amount of money borrowed or saved. |
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rate |
A ratio that compares two quantities measured in different units. The speed limit is 55 miles per hour, ratio or 55 mi/h. |
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ratio |
A comparison of two quantities by division. |
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simple interest |
A fixed percent of the principal. It is found using the formula I = Prt, where P represents the principal, r the rate of interest, and t the time. $100 is put into an account with a simple interest rate of 5%. After 2 years, the account will have earned I = 100 ⋅ 0.05 ⋅ 2 = $10. |
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unit rate |
A rate in which the second quantity in the comparison is one unit. 10 cm per minute |
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expression |
A mathematical phrase containing variables, constants and operation symbols. 6x + 1 |