Question

This is ratio math. The sales tax is $55 on the purchase of a dining room set for $1100. Find the sales tax rate. The sales tax rate is ___ %

Answer 1

In order to determine the sale ta rate, calculate the associated percentage of 55 related to 1100, as follow:

if x is the associated percent, then:

$\frac{x}{100}\cdot1100=55$

by solving the previous equation for x, you obtain:

$x=\frac{55}{1100}\cdot100=5$

Hence, the sales tax rate is 5%