Anthony paid a20% tip on a $15 bill. What was the total amount anthony paid for dinner. Liam paid a 15% tip on his dinner bill. He left the same dollar amount as a tip that Anthony left. What was the amount of Liam's dinner bill beforethe tip

Liams Dinner Bill before tip=$15.65

Step-by-step explanation:

Total amount Anthony paid=Anthony's Bill+Anthony's Tip

where;

Anthony's Bill=$15

Anthony's Tip=20% of $15 = (20/100) * 15=$3

Replacing;

Total amount paid by Anthony = (15+3) = $18

Total amount paid by Liam=Liam's Bill+Liam's Tip

where;

Liam's Bill=B

Liam's Tip=15% of B = (15/100) * B=0.15B

Replacing;

Total amount paid by Liam = (B+0.15B) = 1.15B

Total amount paid by Anthony=Total amount paid by Liam

18=1.15B

B = (18/1.15) = $15.65

Liams Dinner Bill before tip=B=$15.65