Proportionality Retest 23-24

Front

What is percent decrease?

Back

Percent decrease is a measure of how much a quantity has decreased in relation to its original value, expressed as a percentage.

Front

How do you calculate percent decrease?

Back

Percent decrease = ((Original Price - New Price) / Original Price) x 100.

Front

If the price of an item decreases from $50 to $46, what is the percent decrease?

Back

8%.

Front

What is the total cost of buying 7 video games at $25 each and a controller for $75 with a 6% sales tax?

Back

$265.00.

Front

How do you calculate total cost including sales tax?

Back

Total Cost = (Cost of Items) + (Sales Tax) where Sales Tax = (Cost of Items) x (Tax Rate).

Front

What is the formula for finding the constant of proportionality?

Back

Constant of Proportionality = y / x.

Front

If y = 5x, what is the constant of proportionality?

Back

5.

Front

What is the relationship between weight and number of bags if 15 bags weigh 45 pounds?

Back

Each bag weighs 3 pounds.

Front

How do you find the weight of a different number of bags based on a known total weight?

Back

Weight of one bag = Total Weight / Number of Bags.

Front

If 15 bags weigh 45 pounds, how much do 7 bags weigh?

Back

21 pounds.