Percentage Calculations and Concepts

This video tutorial covers seventh-grade math concepts related to percents. It begins with an introduction to percents and how to identify the whole in percent problems. The lesson progresses to solving percent problems through decoding and exercises. An algebraic approach is introduced, followed by using proportional relationships to solve percent problems. The video includes practical examples and exercises to reinforce learning.

What is the whole unit in the scenario: '15 is what percent of 90'?

• 105

• 90

• 15

• 75

In the problem '40 percent of the students on the field trip love the museum', what are you solving for if there are 20 students?

• The variable

• The percent

• The part

• The whole

If 20% of students earned an A and there are 30 students, how many students earned an A?

• 5

• 6

• 7

• 8

How do you convert a percentage to a decimal for calculation purposes?

• Divide by 10

• Multiply by 100

• Divide by 100

• Add 0.1

In a class of 30 students, 70% completed their essay on time. How many students is this?

• 18

• 19

• 20

• 21

What is the algebraic expression to find the number of red candies if 28% of 300 candies are red?

• 300 + 0.28

• 300 * 0.28

• 300 / 0.28

• 300 - 0.28

If 28% of candies are red, how many candies are not red out of 300?

• 150

• 200

• 216

• 84

How can you use mental math to find the number of non-red candies if 84 are red out of 300?

• Add 84 to 300

• Subtract 84 from 300

• Divide 84 by 300

• Multiply 84 by 300

What is the total number of balloons if 24 balloons represent 15% of the total?

• 130

• 140

• 150

• 160

If Hallie has made 112 out of 320 tickets, what percent of the tickets has she completed?

• 30%

• 35%

• 45%

• 40%