So,
To find the sales tax rate, we just need to divide the tax amount by the sale price.
[tex] \frac{21}{350} [/tex]
Simplify the fraction.
[tex] \frac{3*7}{2*5*5*7} [/tex]
[tex] \frac{3}{2*5*5} = \frac{3}{50} = \frac{6}{100}[/tex]
The sales tax was 6%.
