Business Mathematics Brief 12th Edition by Stanley Salzman ,Gary Clendenen, Charles Miller

Exercise 45

Solve for base in each of the following. Round to the nearest hundredth. (See Example.)
Solving for Base
Solve for base, using the formula B =

(a) 8 is 4, of _______.
(b) 135 is 15, of _______.
(c) 1.25 is 25, of _______.
SOLUTION
(a)

(b)

(c)

A problem includes amount of sales, sales tax, and a sales-tax rate. Explain how you could identify the base, rate, and part in this problem. (See Objective.)
OBJECTIVE Find sales when tax amount and tax rate are known. In business problems involving sales tax, the amount of sales is always the base.