7.4.a: Percent Concepts

Front

What is the definition of a percentage?

Back

A percentage is a fraction expressed as a part of 100.

Front

How do you convert a decimal to a percent?

Back

To convert a decimal to a percent, move the decimal point two places to the right and add a percent sign.

Front

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

Back

Percentage = (Part / Whole) x 100.

Front

If a tip is a percentage of the cost, how is it applied to the total cost?

Back

The tip is added to the total cost.

Front

What is 0.25 expressed as a percent?

Back

25%.

Front

How do you find the percentage of a group?

Back

Divide the number of items in the group by the total number of items, then multiply by 100.

Front

What percentage of 200 is 50?

Back

25%.

Front

If there are 80 students in a class and 20 are absent, what percentage of students are present?

Back

75%.

Front

What is the equivalent percent of 0.75?

Back

75%.

Front

How do you calculate the percentage increase from 50 to 75?

Back

Percentage Increase = ((New Value - Old Value) / Old Value) x 100 = ((75 - 50) / 50) x 100 = 50%.