A saleperson’s commission is k percent of the selling price of a car.Which of the following represents the commission
,in dollars,on 2 cars that sold for 14,000 dollars each?
a) 280k
b)7000k
c)28000k
d)14000 / 100+2k
e) 28000+k / 100
( 2 cars * $140,000 ) * (k/100)
280000k/100
280k
Choice A
Plug in, K=10
(2*14000)(.10)=2800
Then look which of the answers give you 2800. A is the only one.
If the word “percent” appears in a problem, the easiest number to choose is almost always 100 (the word percent means “out of 100” after all).
In this case, if you choose k = 100, then 100% of 28,000 is 28,000.
Substitute 100 for k into each answer choice and you will see that only choice (A) comes out to 28,000.
(10 isn’t a bad choice in this case, but if you always use 100 for percent problems you will be able to answer almost all percent questions in the most efficient way.)
Yeah, that’s true. Always try to use 100 with percentage problem.
Thanks a lot !! 