Your dinner bill comes to $19.68. Estimate your total cost for dinner with a 5% tax and a 20% tip on the original bill. Justify your reasoning.

Estimate:

Bill = $20 approximately.

5% tax on $20 = 20/20=$1

20 % on ($20) = $4

Total cost = $20+1+4 = $25

Total bill = $25 approximately.

Exact calculations

bill = 19.68

tax 5% = 0.98

Tip 20% of original = 3.94

Total bill = 19.68+0.98+3.94 = 24.60