Aiden wants to ensure he has enough cash to purchase a $34 couch so he asks a clerk what the total will be
with sales tax included. The clerk tells him the total will
be $40. What is the sales tax percentage? Explain please!

Approximately 18%

Step-by-step explanation:

1. Subtract the cost with tax by the cost without tax.

40-34=6

2. Create a proportion:

=

3. Cross Mutliply to get:

34x=600

4. Divide 34 by both sides to get

x=17.64...

The sales tax is approximately 18%

4 candies

step-by-step explanation:

7 x 28 = 196

200 - 196 = 4 candies remaining.

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x