Question

A smartphone costs $250. Sales tax is 7%. What is the total cost, including tax?

The cost of the smartphone, with tax, is $

Answer 1

Answer:17.5

Explanation:

Our output value is 250

We represent the unknown value wit “x”

250= 100%

x= 7%

By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

250/x = 100%/7%

Again, the reciprocal of both sides gives

x/250= 7/100

X= 17.5

17.5=7% of 250