maths
posted by
arzam
.
A television costs 270.25 dollars including 15% tax. How much of the cost is tax?

maths 
Steve
270.25(1  1/1.15) = 35.25

maths 
arzam
But where does the (11) from (11/1.15) come from?

maths 
Steve
1.15p = 270.25
p = 270.25/1.15 = 235
270.25235 = 35.25
so,
35.25 = 270.25  270.25/1.15 = 270.25(11/1.5)

maths 
Jai
But where does the 1.15 p come from