Week 16 Review: Understanding Percentages and Inequalities

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value. It is calculated using the formula: Percent Error = |(Estimated Value - Actual Value)| / Actual Value * 100%.

Front

How do you calculate percent decrease?

Back

Percent decrease is calculated by taking the difference between the original price and the new price, dividing that by the original price, and then multiplying by 100%. Formula: Percent Decrease = (Original Price - New Price) / Original Price * 100%.

Front

What is the formula for percent increase?

Back

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

Front

How do you solve the inequality @@5x - 7 geq 18@@?

Back

Front

What does it mean if an inequality is written as @@x geq 5@@?

Back

It means that x can be any number greater than or equal to 5.

Front

What is the difference between an equation and an inequality?

Back

An equation states that two expressions are equal, while an inequality shows that one expression is greater than, less than, or not equal to another.

Front

Back

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It is used to compare a number to a whole.

Front

What is the percent decrease when a price goes from $80 to $60?

Back

Percent decrease = (80 - 60) / 80 * 100% = 25%.

Front

What is the percent increase when a price goes from $200 to $250?

Back

Percent increase = (250 - 200) / 200 * 100% = 25%.