Year 8 Unit 2: Real Numbers, Percentages, Rates and Ratios

Flashcards covering key terms and definitions related to real numbers, percentages, rates, and ratios for Year 8 students.

Decimals that have a finite number of digits after the decimal point.

Terminating Decimals

Decimals that have an infinite number of digits after the decimal point, with a repeating pattern.

Recurring Decimals

Numbers that can be expressed as a fraction of two integers.

Rational Numbers

Numbers that cannot be expressed as a simple fraction; their decimal representations are non-repeating and non-terminating.

Irrational Numbers

A fraction expressed as a part of 100.

Percentage

To convert a percentage to a decimal, divide by 100.

Conversion of Percentages to Decimals

To find a percentage of an amount, multiply the amount by the percentage as a decimal.

Calculate Percentage of an Amount

The amount by which a quantity increases expressed as a percentage of the original quantity.

Percentage Increase

The amount by which a quantity decreases expressed as a percentage of the original quantity.

Percentage Decrease

A ratio that compares two different quantities.

Rate

A relationship between two quantities, indicating how many times the first number contains the second.

Ratio

The process of reducing a ratio to its simplest form.

Simplifying Ratios