Question 10:
21.75 ÷ 30 = 0.725
Move the decimal backwards 2 times
72.5
Answer: 72.5%
Question 11:
Sales: $768
Commission Rate: 4%
Commission: $30.72
768 x 4 = 3,072
3,072 ÷ 100 = 30.72
Answer: $30.72
Question 12:
Selling Price: $39.98
Tax Rate: 4.5%
Sales Tax: $1.80
39.98 x 4.5 = 179.91
179.91 ÷ 100 = 1.7991
Then you round to the thousandths.
1.799
1.8
Answer: $1.80
Question 13:
20% x 141 = 28.2
141 + 28.2 = 169.2
Answer: $28.20 gratuity is added to the bill.