A 20% tip on a $100 bill is $20.00, making the total $120.00. For a party of 2, that's $60.00 per person. For a party of 4, it's $30.00 per person.

Key Numbers

• •Bill amount: $100.00
• •Tip (20%): $20.00
• •Total: $120.00
• •Per person (2 people): $60.00
• •Per person (4 people): $30.00
• •15% tip would be: $15.00 (total: $115.00)