whats 15 of 90

Guri Bee

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20-10-2024

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What is 15% of 90? A Simple Guide to Percentages

Understanding percentages is a fundamental skill in many areas of life, from budgeting and shopping to analyzing data. One common question is "What is 15% of 90?" Let's break down how to solve this and explore some practical applications.

Understanding Percentages

A percentage represents a fraction out of one hundred. So, 15% is equivalent to 15/100.

Calculating 15% of 90

There are a couple of ways to calculate this:

• Method 1: Using a Calculator

  • Divide the percentage by 100: 15 / 100 = 0.15
  • Multiply the result by the number: 0.15 * 90 = 13.5

• Method 2: Using Proportions

  • Set up a proportion: 15/100 = x/90
  • Cross-multiply: 15 * 90 = 100 * x
  • Solve for x: 1350 = 100x
  • Divide both sides by 100: x = 13.5

Therefore, 15% of 90 is 13.5

Real-World Applications

Here are some real-life examples where understanding percentages is essential:

• Shopping Discounts: Imagine a shirt is priced at $90 and you find a 15% discount. Knowing that 15% of 90 is $13.50, you can quickly calculate the discount amount and the final price.
• Sales Commissions: If a salesperson earns a 15% commission on every $90 sale, they would make $13.50 for each sale.
• Tax Calculation: Understanding percentages helps you calculate the amount of sales tax on a purchase.

Additional Tips

• Converting Decimals to Percentages: To convert a decimal to a percentage, multiply by 100. For example, 0.25 is equivalent to 25%.
• Converting Percentages to Decimals: To convert a percentage to a decimal, divide by 100. For example, 75% is equivalent to 0.75.

By understanding percentages, you can make informed decisions in various aspects of your life. Remember, practice makes perfect!

Source: This article draws inspiration from the following Github repository: https://github.com/google/python-fire. While the code examples in that repository are related to Python, the underlying mathematical concepts are universally applicable.