AICE Environmental Basic Math

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Vocabulary flashcards covering core math concepts from the video notes, including percent change, range, percentages, and mean/density.

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9 Terms

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Percent change

The change from an initial value to a final value expressed as a percentage: (Final − Initial) / Initial × 100.

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Percent Increase

A positive percent change when the final value is greater than the initial value; computed as (Final − Initial) / Initial × 100.

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Percent Decrease

A percent change when the final value is less than the initial value; computed as (Initial − Final) / Initial × 100.

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Range

The difference between the highest and lowest values in a data set: range = highest value − lowest value.

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Percentage

A way to express a part of a whole as a fraction of 100; calculated as (value ÷ total value) × 100.

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Convert percent to decimal

To convert a percentage to a decimal, divide by 100 (or move the decimal point two places to the left).

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Percent of a number

To find x% of a number, convert x% to a decimal and multiply by the number.

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Mean / Average

Mean (average) = sum of all values ÷ number of values.

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Population density

Population density = number of people ÷ total area.