This past weekend Miss Thomas did some hallelujah shopping. She bought three presents and says that she has 30% of her shopping finished. How many presents does she have left to purchase?

Answer: the number of presents that she has left to purchase is 6

Step-by-step explanation:

Let x represent the total number of presents that she has to purchase.

She bought three presents and says that she has 30% of her shopping finished. This means that she has finished (1/3 * x) = x/3 shopping. This is equivalent to 3 presents. Therefore,

x/3 = 3

x = 3*3 = 9

She had 9 shopping to do

The number of shopping left will be total shopping that she has to do minus the shopping that she has done. It becomes

9 - 3 = 6