75 percent of 90 is 67.5. This can be calculated by multiplying 90 by 0.75, which is the decimal equivalent of 75 percent.
Why is it Important to Know How to Calculate Percentages?
Percentages are used in a wide variety of applications, including:
- Finance: Calculating interest rates, loan payments, and investment returns
- Science: Expressing the concentration of solutions and the purity of substances
- Everyday life: Determining discounts, sales tax, and cooking measurements
How to Calculate Percentages
There are several ways to calculate percentages. The most common method is to use the following formula:
percentage = (part / whole) * 100
For example, to calculate 75 percent of 90, you would use the following formula:
percentage = (75 / 90) * 100
percentage = 0.833 * 100
percentage = 83.3%
Other Methods for Calculating Percentages
In addition to the formula above, there are several other methods for calculating percentages. These include:
- Using a calculator: Most calculators have a percentage key that can be used to calculate percentages.
- Using a spreadsheet: Spreadsheets can be used to calculate percentages by using the PERCENTILE function.
- Using a table: There are tables available that list the percentages of different numbers.
Applications of Percentages
Percentages have a wide variety of applications, including:
- Finance: Calculating interest rates, loan payments, and investment returns
- Science: Expressing the concentration of solutions and the purity of substances
- Everyday life: Determining discounts, sales tax, and cooking measurements
Conclusion
Percentages are a useful tool for expressing the relationship between two numbers. They can be used in a wide variety of applications, including finance, science, and everyday life.