Percentage Calculator

Percentages are a way to express a number as a fraction of 100.

Common Applications:

• Basic Percentage: Find X% of a number
• Percentage Change: Increase or decrease by X%
• Discounts: Calculate sale prices and savings
• Tips: Calculate restaurant tips and service charges

Quick Tips:

• 10%: Move decimal one place left
• 20%: Double 10% value
• 25%: Divide by 4
• 50%: Divide by 2
• 100%: The entire amount

Common Tip Rates:

• 15%: Standard service
• 18%: Good service
• 20%: Excellent service
• 25%+: Outstanding service

Remember that percentages are always calculated relative to the original amount unless specified otherwise.