Question

Jan bought a blazer for $39.90. The price of the blazer was $38. What sales-tax rate was she charged for this blazer?
0.05%
1.90%
5%

Answer 1

1-38/39.90=0.0476
=0.05
=5 percent

Answer 2

Price for the blazer: $38
Price for the blazer plus tax: $39.90

38x = 39.90
Where x is the sales-tax rate.

Divide both sides by 38
x = 1.05