Percent Proportions

Front

What is a percent proportion?

Back

A percent proportion is a way to express a part of a whole as a percentage, typically represented as part/whole = percent/100.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100.

Front

What is the formula to calculate the percent of a number?

Back

The formula to calculate the percent of a number is: (part/whole) x 100 = percent.

Front

If a truck driver drove 105 miles in 1 1/2 hours, how do you calculate the speed in miles per hour?

Back

To calculate speed, use the formula: speed = distance/time. Here, speed = 105 miles / 1.5 hours = 70 mph.

Front

How do you find the percent of seats that are empty in a theater?

Back

To find the percent of empty seats, use the formula: (empty seats/total seats) x 100. If 225 out of 250 seats are sold, then 25 are empty, so (25/250) x 100 = 10%.

Front

Which is the better deal: Oreos for $2.98 for 15 oz or Chips Ahoy for $2.50 for 14 oz?

Back

To determine the better deal, calculate the price per ounce for each. Oreos: $2.98/15 oz = $0.1987 per oz; Chips Ahoy: $2.50/14 oz = $0.1786 per oz. Chips Ahoy is the better deal.

Front

What is 6.8% as a decimal?

Back

6.8% as a decimal is 0.068.

Front

How do you calculate the percent increase or decrease?

Back

To calculate percent increase or decrease, use the formula: ((new value - old value) / old value) x 100.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying the fraction by 100. For example, 1/4 = 0.25 = 25%.

Front

What does it mean if a percentage is greater than 100%?

Back

A percentage greater than 100% indicates that the part is larger than the whole.