Week #3 Lesson #3:Finding Percent Increase or Decrease

Front

What is percent increase?

Back

Percent increase is a measure of how much a quantity has grown relative to its original amount, expressed as a percentage. It is calculated using the formula: \( \text{Percent Increase} = \frac{\text{New Value} - \text{Original Value}}{\text{Original Value}} \times 100 \% \.

Front

What is percent decrease?

Back

Percent decrease is a measure of how much a quantity has shrunk relative to its original amount, expressed as a percentage. It is calculated using the formula: \( \text{Percent Decrease} = \frac{\text{Original Value} - \text{New Value}}{\text{Original Value}} \times 100 \% \.

Front

How do you calculate the percent change?

Back

Percent change can be calculated using the formula: \( \text{Percent Change} = \frac{\text{New Value} - \text{Original Value}}{\text{Original Value}} \times 100 \% \.

Front

If a bike is bought for $550 and sold for $680, what is the percent profit?

Back

The percent profit is calculated as follows: \( \text{Percent Profit} = \frac{680 - 550}{550} \times 100 \% = 23.6\% \.

Front

What is the percent of change when a class size increases from 35 to 42?

Back

The percent of change is calculated as follows: \( \text{Percent Change} = \frac{42 - 35}{35} \times 100 \% = 20\% \.

Front

Amber's hourly wage increased from $8 to $9.50. What is the percent increase?

Back

The percent increase is calculated as follows: \( \text{Percent Increase} = \frac{9.50 - 8}{8} \times 100 \% \approx 19\% \.

Front

Tom's weekly salary increased from $240 to $288. What is the percent of change?

Back

The percent of change is calculated as follows: \( \text{Percent Change} = \frac{288 - 240}{240} \times 100 \% = 20\% \.

Front

The Polar Express movie costs $12 and is on sale for $8. What is the percent of change?

Back

The percent of change is calculated as follows: \( \text{Percent Change} = \frac{12 - 8}{12} \times 100 \% = 33\% \.

Front

What is the formula for calculating profit?

Back

The formula for calculating profit is: \( \text{Profit} = \text{Selling Price} - \text{Cost Price} \.

Front

What does a percent increase of 100% mean?

Back

A percent increase of 100% means that the new value is double the original value.