Middle School Mathematics: Ratios, Rates, and Percents

Vocabulary and concept review flashcards covering unit rates, time and cost calculations, percent models, 10x10 grids, and conversions from lecture notes.

Speed Comparison (Martinez)

The calculated difference in travel rates showing that Martinez travels faster by $4\,\text{mph}$.

Race Duration Calculation

The computation found by finding the difference between race times: $336 - 216 = 120\,\text{min}$, which is equivalent to $2\,\text{hours}$.

Warehouse Cost Calculation

The calculation determining the total cost of \n$59.76 for warehouse candy goods across $36$ items.

Bar Diagram Unit Value ($5\%$)

A visual representation where each individual section or piece equals $5\%$, meaning $18$ pieces must be shaded to represent $90\%$.

$10 \times 10$ Percent Grid

A model consisting of $10 \times 10 = 100$ individual units used to visually represent fractions and parts out of $100\%$.

Percent

A mathematical ratio whose second term or comparison base is always $100$.

Shading to Model Percents

A method of demonstrating a given percentage by filling in the exact corresponding number of squares in a hundred-grid (such as $17$ squares for $17\%$).

$265\%$ Representation

A percent greater than $100\%$ visually represented by two fully shaded $100$-unit grids plus $65$ shaded squares of a third grid.

Percent-to-Decimal Conversion

The standard process of converting a percentage into decimal form by dividing the value by $100$.