3rd 6 Weeks Flashcard 3.2

Front

What is the formula to calculate the percentage of a part compared to the whole?

Back

Percentage = (Part / Whole) x 100

Front

If there are 80 blue marbles and 70 red marbles, how many marbles are there in total?

Back

Total marbles = 80 + 70 = 150

Front

What is 35% of a total number if 140 represents that percentage?

Back

Total = 140 / 0.35 = 400

Front

How do you find the regular price of an item if you know the discount and the percentage of the discount?

Back

Regular Price = Discount Amount / (Discount Percentage / 100)

Front

What is the formula to calculate speed?

Back

Speed = Distance / Time

Front

If a train travels 260 miles in 5 hours, what is its speed in miles per hour?

Back

Speed = 260 miles / 5 hours = 52 miles per hour

Front

What is the relationship between cups of flour and brownies made if 2 cups of flour make 30 brownies?

Back

The ratio is 2 cups of flour for 30 brownies.

Front

How do you convert a fraction to a percentage?

Back

Multiply the fraction by 100.

Front

What is the meaning of 'discount' in shopping?

Back

A discount is a reduction in the regular price of an item.

Front

If a backpack costs $20 after a 30% discount, what was the original price?

Back

Original Price = $20 / (1 - 0.30) = $28.57