7.4.a: Percent Concepts

Front

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

Back

Percentage = (Part / Whole) × 100

Front

If 40% of a group prefers a certain activity, what percentage does not prefer that activity?

Back

100% - 40% = 60% do not prefer that activity.

Front

How do you calculate the number of individuals who prefer a certain option if you know the percentage and the total number of individuals?

Back

Number of individuals = (Percentage / 100) × Total number of individuals.

Front

What does it mean when a discount is described as a percentage of the cost?

Back

It means that the discount amount is calculated as a fraction of the total cost, which is then subtracted from the total.

Front

If there are 100 items and 35 are of one type, what percentage of the items are of that type?

Back

Percentage = (35 / 100) × 100 = 35%.

Front

What is the percentage of items that are not of a certain type if 65% are of that type?

Back

100% - 65% = 35% are not of that type.

Front

In a survey, if 300 children attend a sport club and 40% prefer football, how many children prefer football?

Back

120 children prefer football.

Front

What is the relationship between percentages and fractions?

Back

Percentages are a way of expressing a fraction out of 100.

Front

How can you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100 (e.g., 40% = 0.40).

Front

If 60% of children at a party had ice cream, how do you find the number of children who did not have ice cream?

Back

Subtract the percentage who had ice cream from 100% (100% - 60% = 40%).