Homework 1/8

Front

What is percent change?

Back

Percent change is a measure of how much a quantity has increased or decreased relative to its original value, expressed as a percentage.

Front

How do you calculate percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) * 100.

Front

What does a negative percent change indicate?

Back

A negative percent change indicates a decrease in value.

Front

What does a positive percent change indicate?

Back

A positive percent change indicates an increase in value.

Front

If Mary weighed 180 pounds and now weighs 150 pounds, what is the percent change in her weight?

Back

17% Decrease.

Front

What is the formula for calculating percent increase?

Back

Percent Increase = ((New Value - Old Value) / Old Value) * 100.

Front

If an item sold for $50 after starting at $20, what is the percent increase?

Back

150%.

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the true value.

Front

How do you calculate percent error?

Back

Percent Error = (|Estimated Value - Actual Value| / Actual Value) * 100.

Front

If an archaeologist estimated a fossil to be 520 years old, but it was actually 500 years old, what is the percent error?

Back

4%.