Step-by-step arithmetic breakdown
To calculate 40% of 40, convert the percentage into a decimal by dividing by 100, then multiply by the whole amount:
1. Convert percentage to fraction: 40 / 100 = 0.4000
2. Multiply by base number: 0.4000 × 40
3. Exact result: 16
Everyday real-world applications
- Retail & Discounts: If a product priced at $40 is discounted by 40%, your savings equal $16.
- Tax & Tips: A 40% service tip on a $40 restaurant bill equals exactly $16.
- Financial Yields: An investment yielding 40% on a principal of $40 produces $16 in interest.