Percentages Made Easy!

TL;DR

This video teaches how to calculate percentages mentally without using a calculator, and then confirms the answers using a calculator.

Transcript

in this video we're going to focus on calculating percentages without the use of a calculator we're going to do it mentally and then we'll confirm our answer with the use of a calculator so here's the first question what is 15 of 200 how can we find the answer to this question mentally well first ask yourself what is ten percent of two hundred to f... Read More

Key Insights

• 🗨️ Moving the decimal one unit to the left helps to find 10% of a number.
• ⏫ Doubling the value of 10% gives 20% of the number.
• #️⃣ Half of 10% is equivalent to finding 5% of the number.
• 🗂️ Dividing a percentage by 100 converts it to a decimal.
• ❓ Calculating percentages mentally is useful for quick everyday calculations.
• ✅ Checking answers with a calculator helps to ensure accuracy.
• 🍳 The steps for calculating percentages mentally involve breaking down the problem into smaller, easier calculations.

Questions & Answers

Q: How do you find the value of 15% of 200 mentally?

To find 15% of 200 mentally, we first find 10% (20) and then half of 10% (10), which results in 30.

Q: How do you find 25% of 300 mentally?

To find 25% of 300 mentally, we find 10% (30), double it for 20% (60), and then add half of 10% (15), resulting in 75.

Q: What is the process to calculate 40% of 500 mentally?

To calculate 40% of 500 mentally, we find 10% (50) and multiply it by 4, resulting in 200.

Q: How do you find 24% of 80 mentally?

To find 24% of 80 mentally, we find 10% (8), 20% (16), 1% (0.8), 4% (3.2), and then add them together to get 19.2.

Summary & Key Takeaways

• The video explains how to find 15% of 200 by first finding 10% (20) and then half of 10% (10), resulting in 30 as the answer.

• It demonstrates the same method to find 25% of 300 by finding 10% (30), doubling it for 20% (60), and then adding half of 10% (15), resulting in 75.

• The video also covers finding 40% of 500 by finding 10% (50) and multiplying it by 4, resulting in 200.

• It further explains finding 24% of 80 by finding 10% (8), 20% (16), and 4% (3.2), and then adding them together to get 19.2.

• Lastly, it teaches how to find 33% of 120 by finding 10% (12), 30% (36), 1% (1.2), 3% (3.6), and then adding them to get 39.6.