Percentage Problems and Solutions

The video tutorial explains how to find the whole number given a part and a percentage using proportions. It provides several examples, such as finding what number 30% of 15 is, and applies the method to real-world scenarios like determining the total number of trucks in stock or M&M's in a bag. The process involves setting up a proportion, cross-multiplying, and solving a simple equation.

What method is used to find the whole given the part and percent?

• Subtraction

• Addition

• Division

• Proportion

If 30% of a number is 15, what is the number?

• 45

• 50

• 60

• 55

What is the first step in solving 30% of a number is 15?

• Add 30 and 15

• Divide 15 by 30

• Set up a proportion

• Multiply 30 by 15

If 18 is 20% of a number, what is the number?

• 95

• 85

• 80

• 90

What is the equation used to solve 18 is 20% of a number?

• 20x = 1800

• 20x = 360

• 20x = 900

• 20x = 18800

If 40% of a number is 50, what is the number?

• 120

• 110

• 100

• 125

What is the result of dividing 5000 by 40 in the context of the problem?

• 135

• 130

• 125

• 120

If 153 is 60% of a number, what is the number?

• 260

• 255

• 250

• 265

What is the equation used to solve 153 is 60% of a number?

• 60x = 918

• 60x = 15300

• 60x = 1530

• 60x = 9180

If 20% of trucks are on sale and 18 trucks are on sale, how many trucks are in stock?

• 80

• 85

• 95

• 90