Percents Review 3B

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. It is calculated using the formula: Percent Error = |(Measured Value - Actual Value)| / Actual Value × 100%.

Front

How do you calculate percent increase?

Back

Percent increase is calculated by taking the difference between the new value and the original value, dividing that difference by the original value, and then multiplying by 100. Formula: Percent Increase = (New Value - Original Value) / Original Value × 100%.

Front

What is the formula for calculating the sale price after a discount?

Back

Sale Price = Original Price - (Discount Percentage × Original Price).

Front

If a product is marked up by a certain percentage, how do you find the selling price?

Back

Selling Price = Original Price + (Markup Percentage × Original Price).

Front

What is a 15% discount on a $40 book?

Back

A 15% discount on a $40 book is calculated as: 0.15 × 40 = $6. Therefore, the sale price is $40 - $6 = $34.

Front

What is the percent error if the estimated attendance was 15,000 and the actual attendance was 12,500?

Back

Percent Error = |(15,000 - 12,500)| / 15,000 × 100% = 20%.

Front

How do you find the percent increase from $50 to $75?

Back

Percent Increase = (75 - 50) / 50 × 100% = 50%.

Front

What is the percent error if Amari measured a pen as 22 cm and the actual length is 23 cm?

Back

Percent Error = |(22 - 23)| / 23 × 100% = 4.35% (approximately 4.3%).

Front

If a TV costs $95 and is marked up by 45%, what is the selling price?

Back

Selling Price = 95 + (0.45 × 95) = 95 + 42.75 = $137.75.

Front

What does a 60% increase mean in terms of original value?

Back

A 60% increase means the new value is 160% of the original value. For example, if the original value is $100, the new value would be $100 + ($100 × 0.60) = $160.