Question

Which of the following expressions could be used to find the sale price of an item that costs d dollars if it is on sale for 30% off?

0.7 d
0.3 d
30 d
70 d

Answer 1

Answer: 0.3d should be correct

Answer 2

0.3 d

Explanation:

A percent is basically the percent over 100

In this case, the item is 30% off so you can write 30% as a fraction like the following:

30/100

Now we can convert that to decimal

30/100 is also 0.30

Since there is no need for the extra zero in this case

the answer for this question is:

0.3 d