To find the percentage of a number, you can follow these steps:

Formula for Percentage:

$\text{Percentage} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100$

• Part is the portion of the whole you are interested in.
• Whole is the total amount that the part is being compared to.

Example 1:

If you want to find what 30 is as a percentage of 200: $\text{Percentage} = \left( \frac{30}{200} \right) \times 100 = 15\%$ So, 30 is 15% of 200.

Example 2:

If you want to find 25% of 80: $\text{Percentage} = \frac{25}{100} \times 80 = 20$ So, 25% of 80 is 20.

Key Points:

• To find a percentage of a number, multiply the number by the percentage and divide by 100.
• To convert a percentage to a fraction: Divide the percentage by 100.
• To find a percentage increase or decrease, you can use the formula: $\text{Percentage Change} = \left( \frac{\text{New Value} - \text{Original Value}}{\text{Original Value}} \right) \times 100$

Let me know if you need more details or examples!

Related Questions:

1. How do you find a percentage of a large number?
2. How can you calculate percentage increase or decrease?
3. What’s the difference between percentage and percentage points?
4. How do you convert a decimal to a percentage?
5. Can you calculate the percentage without a calculator?

Tip:

Always remember to multiply by 100 when converting a fraction or decimal to a percentage!