1. Percentage of a Number:
Percentage = (Part / Whole) × 100
2. Find the Part:
Part = (Percentage × Whole) / 100
3. Find the Whole:
Whole = (Part × 100) / Percentage
Percentage Change = [(New Value - Old Value) / Old Value] × 100
Percentage Increase = [(New Value - Original Value) / Original Value] × 100
Percentage Decrease = [(Original Value - New Value) / Original Value] × 100
Discounted Price = Original Price × (1 - (Discount Percentage / 100))
Tip Amount = Bill Amount × (Tip Percentage / 100)
Total with Tax = Original Amount × (1 + (Tax Percentage / 100))
Selling Price = Cost Price × (1 + (Markup Percentage / 100))
| Fraction | Decimal | Percentage |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 1/10 | 0.1 | 10% |
| 1/100 | 0.01 | 1% |
How do I calculate a percentage between two numbers?
Use the formula: (Part / Whole) × 100
How do I add 15% to a price?
Multiply the price by 1.15
What's the difference between percentage points and percent?
Percentage points refer to absolute difference, while percent refers to relative difference
How do I calculate reverse percentages?
Use the formula: Original Amount = (Final Amount × 100) / (100 ± Percentage Change)