Percent Change Practice

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 is calculated using the formula: ((New Value - Old Value) / Old Value) * 100.

Front

What is the formula for percent decrease?

Back

Percent decrease is calculated using the formula: ((Old Value - New Value) / Old Value) * 100.

Front

What is the formula for percent increase?

Back

Percent increase is calculated using the formula: ((New Value - Old Value) / Old Value) * 100.

Front

If a tank of water decreases from 12 gallons to 8.4 gallons, what is the percent change?

Back

The percent change is 30% decrease.

Front

How do you determine if a price is a decrease or increase?

Back

Compare the original price to the sale price; if the sale price is lower, it's a decrease; if higher, it's an increase.

Front

What is the percent change when a price goes from $66.64 to $29.99?

Back

The percent change is a 54.9% decrease.

Front

If attendance drops from 250 to 195 students, how do you calculate the percent decrease?

Back

Use the formula: ((250 - 195) / 250) * 100 = 22% decrease.

Front

What does a 50% increase in earnings mean?

Back

It means the new earnings are 50% higher than the original earnings.

Front

How do taxes affect the total cost of an item?

Back

Taxes increase the total cost; calculate by multiplying the item price by the tax rate and adding it to the original price.