Percentage Problems and Calculations

This video tutorial by Mr. Hul covers the concept of percentages, focusing on the relationship between part, whole, and percent. It provides various examples, including classroom scenarios, field trips, and practical problems involving candy, balloons, and ticket production. The tutorial emphasizes solving percentage problems using equations and cross-multiplication, offering a step-by-step approach to understanding and applying percentage calculations.

What is the basic equation used to solve percentage problems?

• Part + Whole = Percentage

• Part / Whole = Percentage / 100

• Whole * Part = Percentage

• Whole - Part = Percentage

If 15 is what percent of 90, what is the percentage?

• 10%

• 15%

• 20%

• 16.67%

In a class of 30 students, 20% earned an A. How many students is that?

• 4 students

• 7 students

• 6 students

• 5 students

If 12% of 25 art projects received a perfect score, how many projects is that?

• 5 projects

• 4 projects

• 2 projects

• 3 projects

What percentage of students completed the essay if 21 out of 30 did so?

• 90%

• 80%

• 70%

• 60%

If 28% of 300 candies are red, how many candies are red?

• 90 candies

• 78 candies

• 72 candies

• 84 candies

How many candies are not red if 28% of 300 candies are red?

• 210 candies

• 216 candies

• 200 candies

• 220 candies

If Zoe inflated 24 balloons, which is 15% of the total, how many balloons are there in total?

• 160 balloons

• 150 balloons

• 180 balloons

• 200 balloons

Haley has made 112 out of 320 tickets. What percentage of the tickets has she completed?

• 40%

• 45%

• 35%

• 30%

If 72% of the candies are not red, how many candies are not red out of 300?

• 210 candies

• 220 candies

• 200 candies

• 216 candies