SY23-24 Unit 3 Standard Percents, Ratios and Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you calculate a percent discount?

Back

To calculate a percent discount, multiply the original price by the discount percentage (as a decimal) and subtract that amount from the original price.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply the result by 100.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you find the percent change?

Back

Percent change is calculated by taking the difference between the new value and the old value, dividing by the old value, and then multiplying by 100.

Front

What does it mean for a relationship to be proportional?

Back

A relationship is proportional if it can be expressed as a constant ratio, meaning it forms a straight line through the origin on a graph.

Front

What is the formula for calculating speed?

Back

Speed = Distance ÷ Time.

Front

What is a positive slope?

Back

A positive slope indicates that as one variable increases, the other variable also increases.

Front

What is a negative slope?

Back

A negative slope indicates that as one variable increases, the other variable decreases.