Basic Percentage Calculator:

• Calculates what percentage of a number is
• Example: What is 15% of 200?

Percentage Change Calculator:

• Calculates the percentage increase or decrease between two values
• Shows both percentage change and absolute change
• Example: Change from 100 to 150 = 50% increase

Reverse Percentage Calculator:

• Finds the original value before a percentage change
• Example: If current value is 120 after a 20% increase, what was the original value?