Rate, Ratio and Percent

A ratio that compares the inaccuracy of an estimate (amount of error) to the actual amount is called ​ ​ (a)  

• percent error

• percent of change

• markdown

• proportional

A comparison between two quantities, in which for every A units of one quantity, there are B units of another quantity is called a​ (a)  

• ratio

• proportion

• proportional relationship

• proportional

• unit rate

• constant of proportionality

An equation stating that two ratios or rates are equivalent is a ​ (a)  

• proportion

• ratio

• proportional relationship

• proportional

• unit rate

• nonproportional

• constant of proportionality

Two quantities are in a ​ (a)   if the two quantities vary and have a constant ratio between them.

• proportional relationship

• proportional

• unit rate

• nonproportional

• constant of proportionality

If 25% of a number is 50, what is the number?

• 200

• 150

• 100

• 250

If 45% of a number is 90, what is the number?

• 150

• 200

• 250

• 300

If 30% of a number is 45, what is the number?

• 150

• 75

• 200

• 120

If 20% of a number is 40, what is the number?

• 100

• 200

• 150

• 250

What is 50% of 300?

• 150

• 200

• 100

• 250

What is 40% of 250?

• 200

• 100

• 60

• 150