1. Example A: Jake earns 3% commission on the cars he sells
Example A: Jake earns 3% commission on the cars he sells. If he sells $50,000 of cars in March, how much commission does he earn? 𝑥
commission
3 100
commission =
50000
sales
sales
150000 =
100𝑥
100
100
1500
1500 = 𝑥

2. Example B: Ruth sold $60,000 of computer equipment in April
Example B: Ruth sold $60,000 of computer equipment in April. Her commission was $2400. What percent commission does she earn?
commission
100 𝑥
2400
commission =
sales
60000
sales
60000𝑥 =
240000
60000
60000 4 𝑥 =
The commission is 4 %

3. Example C: Beth earns 8% commission on the farming equipment she leases. If her last paycheck was for $1800, how much equipment did she lease?
commission
8 100
1800
commission = 𝑥
sales
sales 8𝑥 =
180000 8 8 𝑥 =
22,500
22,500

5. What is a gratuity (tip)?

6. Example D: Mr. Jordan takes his wife to a restaurant and the bill is €36. If he wants to tip 15%, how much should he leave?
Example E: Mr. Yost takes his wife to a restaurant and the bill is €48. If he leaves €6 for tip, what percentage is he tipping?
Example F: Mr. Petrtiz takes his wife to a restaurant. He is very generous, and always tips 20%. The tip is €8.50. How much was the bill?

7. Example D: Mr. Jordan takes his wife to a restaurant and the bill is €36. If he wants to tip 15%, how much should he leave?
What is 15% of 36? 𝑥
15 100
15 100 36 𝑥
15 100
tip
tip = = 36
total
total
15 36
540 =
100 𝑥
100𝑥
3 36
108 =
20 𝑥
20𝑥
100
100 20 20 =
5.40 𝑥
5.40 5 . 4 =
5.40 𝑥
5.40
100
5 4 0 . −
5 0 0
3 20
3 20
3∙5 2∙2∙5∙5 = =
4 0 −
4 0 0

8. Example D: Mr. Jordan takes his wife to a restaurant and the bill is €36. If he wants to tip 15%, how much should he leave?
What is 15% of 36?
What 𝑥 =
0.15 is
15% of ∙ 36 36 𝑥 =
5.40

9. Example E: Mr. Yost takes his wife to a restaurant and the bill is €48
Example E: Mr. Yost takes his wife to a restaurant and the bill is €48. If he leaves €6 for tip, what percentage is he tipping?
What percent of 48 is 6?
100 𝑥
tip 6
tip
100 𝑥
6 48
6 48 = = 48
total
total
𝑥 8 8𝑥 =
100 1
100
𝑥 48
48𝑥 =
100 6
600 48 48 8 8
600 48 = 𝑥 𝑥
12.5
12.5 =
2∙2∙2∙3∙5∙5 𝑥=
2∙2∙2∙2∙3
1 8
1 8
𝑥= 75 6
2∙3 2∙2∙2∙2∙3 = = =
12.5
12.5

10. Example E: Mr. Yost takes his wife to a restaurant and the bill is €48
Example E: Mr. Yost takes his wife to a restaurant and the bill is €48. If he leaves €6 for tip, what percentage is he tipping?
What percent of 48 is 6?
What percent
0.01𝑥 of ∙ 48 48 = is 6 6
0.48𝑥 =6
0.48
0.48
𝑥 =
12.5

11. Example F: Mr. Petritz takes his wife to a restaurant
Example F: Mr. Petritz takes his wife to a restaurant. He is very generous, and always tips 20%. The tip is €8.50. How much was the bill?
8.50 is 20 percent of what number?
8.5
20 100
20 100
20 100
8.5
tip
tip = = 𝑥 𝑥
total
total
1 𝑥 𝑥 =
5 8.5
42.5
42.5
20 𝑥
20𝑥 =
850 20 20
850 20
= 85 2 𝑥 =
𝑥=42.5
42.5
2∙2∙5 2∙2∙5∙5
1 5
1 5 = =

12. Example F: Mr. Adams takes his wife to a restaurant
Example F: Mr. Adams takes his wife to a restaurant. He is very generous, and always tips 20%. The tip is €8.50. How much was the bill?
8.50 is 20 percent of what number?
8.50
8.50
20%
0.2 = is of ∙
what number 𝑥
8.5=0.2𝑥
0.2
0.2 𝑥=
42.5