Probability is the study of chance. The probability of something happening can be expressed in multiple forms, as either a decimal, a percentage, or a fraction. You can compute a probability in terms of ratios. Since any ratio can be converted into a fraction, percentage, or decimal, this means that any probability can be easily converted into a decimal, fraction, or percentage. For example, when you roll a number cube, the probability of getting a "3" is: P(3) = favorable outcomes : total outcomes. P(3) = 1:6s You can write the same probability as a fraction simply by rewriting the two numbers in the ratio as the numerator and denominator of a fraction. Here’s how you can do this: P(3) = 16 Now to express this fraction as a decimal, you may divide the numerator by the denominator. 1/6 = 0.1666. The answer is 0.1666... or 0.167. To express this decimal as a percentage, multiply the decimal by 100. Then, move the decimal point two places to the right to show the percent. % = 0.167×100. % = 16.7. The answer is 16.7%. The decimal 0.167 is equal to 16.7%. To sum up, the probability of rolling a 3 with a number cube is 1 out of 6 and can be expressed in the forms explained above.
In these worksheets, students will practice calculating probability. They will express probability in the form of a decimal. They will express probability in the form of a percentage. They will express probability in the form of a fraction. Some problems may require that students convert the answer from one form to another. This set of worksheets contains lessons, step-by-step solutions to sample problems, both simple and more complex problems, a review, and a quiz. It also includes ample worksheets for students to practice independently. When finished with this set of worksheets, students will be able to recognize basic properties of a parabola by studying its equation. These worksheets explain how to calculate probability as a decimal, a fraction, and a percentage. Sample problems are solved and practice problems are provided.