Percent Word Problems

Front

What is a percent and how is it calculated?

Back

A percent is a ratio expressed as a fraction of 100. It is calculated by dividing the part by the whole and then multiplying by 100.

Front

How do you find a percentage of a total quantity?

Back

To find a percentage of a total quantity, multiply the total quantity by the percentage (in decimal form). For example, to find 30% of 60, calculate 60 * 0.30 = 18.

Front

What is the formula for calculating the probability of an event?

Back

The probability of an event is calculated using the formula: P(Event) = Number of favorable outcomes / Total number of outcomes.

Front

How do you determine the probability of selecting a specific letter from a set of letters?

Back

To determine the probability of selecting a specific letter, count the number of times that letter appears and divide it by the total number of letters.

Front

What does it mean if a percentage represents a part of a whole?

Back

It means that the percentage indicates how much of the total quantity is represented by that part, expressed in relation to 100.

Front

How do you calculate the percentage of students participating in an event?

Back

To calculate the percentage of students participating, divide the number of participating students by the total number of students and multiply by 100.

Front

What is the concept of complementary percentages?

Back

Complementary percentages refer to the percentages that add up to 100%. For example, if 70% of students like pizza, then 30% do not.

Front

How can you express a probability as a fraction?

Back

A probability can be expressed as a fraction by taking the number of favorable outcomes and placing it over the total number of possible outcomes.

Front

What is the significance of a probability of 0?

Back

A probability of 0 indicates that the event cannot occur; it is impossible.

Front

How do you calculate the percentage of a group that has a specific opinion?

Back

To calculate the percentage of a group with a specific opinion, divide the number of individuals with that opinion by the total number of individuals in the group and multiply by 100.