Question 1

How do I calculate a percentage of a number?

Accepted Answer

To calculate X% of a number Y, multiply the number by the percentage and divide by 100. Formula: Result = Y × (X/100). For example, 25% of 200 = 200 × 0.25 = 50.

Question 2

How do I find what percentage X is of Y?

Accepted Answer

Divide the part by the whole and multiply by 100. Formula: Percentage = (X/Y) × 100. For example, 50 is what percent of 200? → (50/200) × 100 = 25%.

Question 3

How do I calculate percentage change?

Accepted Answer

Use the formula: ((New Value - Old Value) / Old Value) × 100. For example, from 100 to 150: ((150-100)/100) × 100 = 50% increase. A negative result means a decrease.

Question 4

How do I increase a number by a percentage?

Accepted Answer

Multiply the number by (1 + percentage/100). For example, to increase 200 by 25%: 200 × 1.25 = 250. In Excel: =A1*(1+25%).

Question 5

How do I decrease a number by a percentage?

Accepted Answer

Multiply the number by (1 - percentage/100). For example, to decrease 200 by 25%: 200 × 0.75 = 150. In Excel: =A1*(1-25%).

Question 6

Is this percentage calculator free?

Accepted Answer

Yes, this percentage calculator is completely free with no limits. No registration required, no credit card needed. All calculations are performed in your browser.

Question 7

How do I calculate percentage in Excel?

Accepted Answer

In Excel, use formulas like: =A1*25% (percentage of), =A1/B1 (what percent is), =(B1-A1)/A1 (percentage change). Format cells as percentage for proper display.

Question 8

How do I calculate a tip percentage?

Accepted Answer

Multiply the bill by the tip percentage. For a 15% tip on $50: 50 × 0.15 = $7.50. Common tip percentages are 15% (standard), 18% (good service), and 20% (excellent service).

Question 9

What is the percentage difference between two numbers?

Accepted Answer

Use percentage change: ((New - Old) / Old) × 100. For difference between 80 and 100: ((100-80)/80) × 100 = 25%. The 100 is 25% more than 80.

Question 10

Can percentages be greater than 100%?

Accepted Answer

Yes, percentages can exceed 100%. For example, 200% of 50 = 100. This means twice the original amount. A 150% increase means the new value is 2.5 times the original.

Question 11

How do I reverse a percentage calculation?

Accepted Answer

To find the original value before a percentage was added: Original = Final / (1 + percentage/100). For example, if 125 is the result after adding 25%: 125 / 1.25 = 100.

Question 12

How is this different from ElyxAI?

Accepted Answer

This free calculator handles basic percentage calculations. ElyxAI is a powerful AI assistant that works directly in Excel to automate complex calculations, create formulas, and analyze data. Try ElyxAI free for 7 days!

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