Question 397612
Sarah bought a laptop for $1800. The total cost, including tax, came to $1890. What is the tax rate?
.
Let x = tax rate
then
1800 + 1800x = 1890
1800(1 + x) = 1890
1 + x = 1890/1800
x = 1890/1800 - 1
x = 1.05 - 1
x = .05
or
x = 5%