Grade 7 Unit 4 Glossary Flashcards

Vocabulary terms and mathematical definitions regarding percentages and decimals from the Grade 7 Unit 4 Glossary.

percent decrease

How much a quantity goes down, expressed as a percentage of the starting amount. For example, a store with $64$ hats on Friday and $48$ hats on Saturday had a decrease of $16$, which is a $25\%$ decrease because $16$ is $25\%$ of $64$.

percent error

A way to describe the difference between a desired value and the actual value, expressed as a percent of the desired value. For example, if a box supposed to have $150$ folders only has $147$, the error is $3$ folders, and the percent error is $2\%$ because $\frac{3}{150} = 0.02 = 2\%$.

percent increase

How much a quantity goes up, expressed as a percentage of the starting amount. For example, if an amount goes from $50$ to $56$, the increase of $6$ is a $12\%$ increase because $\frac{6}{50} = 0.12 = 12\%$.

repeating decimal

A decimal with one or more digits (not all zeros) that repeat forever. It can be written using bar notation over the repeating digits or with ellipses (…) at the end. For example, $\frac{1}{3}$ is $0.33333...$ and $\frac{25}{22}$ is $1.1363636...$

terminating decimal

A decimal with a finite number of non-zero digits after the decimal point. Examples include $0.08$, $1.5$, and $0.2563$. A repeating decimal where the repeating digits are all zeros is also called a terminating decimal.