Percentage increase and decrease | Summary and Q&A

TL;DR

Learn how to increase or decrease numbers by a percentage using logical methods and shortcut techniques.

Key Insights

• #️⃣ There are two methods to increase or decrease numbers by a percentage: the traditional method and shortcut techniques.
• 🪜 In the traditional method, the percentage is found, added or subtracted from the original number.
• 🎭 Shortcut methods involve converting the percentage to a decimal and performing multiplication or subtraction.
• 🤝 Shortcut methods can save time in calculations when dealing with various percentages and numbers.
• 👻 Conceptualizing percentages as decimals simplifies calculations and allows for quick mental math.
• #️⃣ The shortcuts can be applied to different scenarios to increase or decrease numbers by varying percentages.
• 💨 Memorizing the decimal equivalents of common percentages can aid in faster calculations.

Transcript

good day welcome to the tech math Channel what we're going to be having a look at in this video is how to increase or decrease a number by percentage so we're going to look at uh some nice straightforward ways of doing this and I'm going to show a bit of a shortcut way so I'm sort of going to go through the way which uh you probably are going to be... Read More

Questions & Answers

Q: How can I increase a number by a percentage using the traditional method?

To increase a number by a percentage, find the percentage of the number by multiplying it with the given percentage. Then, add this calculated value to the original number to get the increased result.

Q: Can you show an example of using the shortcuts to increase a number by a percentage?

Yes. To quickly increase a number by a percentage, convert the percentage to a decimal. Then, multiply the decimal by the original number and add the result to the original number.

Q: How do I decrease a number by a percentage using the traditional method?

To decrease a number by a percentage, find the percentage of the number by multiplying it with the given percentage. Then, subtract this calculated value from the original number to get the decreased result.

Q: Is there a shortcut method to decrease a number by a percentage?

Yes. To quickly decrease a number by a percentage, convert the percentage to a decimal. Then, subtract the decimal from 1, multiply the result by the original number, and get the decreased value.

Summary & Key Takeaways

• This video explains how to increase or decrease a number by a percentage, providing a step-by-step approach and shortcuts.

• The traditional method involves finding a percentage of the number and adding or subtracting it from the original number.

• The shortcut method involves conceptualizing the percentage as a decimal and multiplying it by the original number.