Answer:
Approximately 18%
Step-by-step explanation:
1. Subtract the cost with tax by the cost without tax.
40-34=6
2. Create a proportion:
[tex]\frac{6}{34}[/tex]=[tex]\frac{x}{100}[/tex]
3. Cross Mutliply to get:
34x=600
4. Divide 34 by both sides to get
x=17.64...
The sales tax is approximately 18%