math
posted by jimmy .
A store sold 64 sweatshirts one day. Of these, 12 were gray. The store manager plans to order 400 more sweatshirts.
Based on the data, how many gary sweatshirts should the manager order?

12 gray out of 64. Find the percent: 12 divided by 64 = ?? (you'll get a decimal, no need to move decimal to make a percentjust keep the decimal for the next step.
Next step: 400 x the decimal found above = ?? and this answer will tell you how many gray sweatshirts to order in the 400 lot.
Then, check your work:
Does 12 divided by 64 = the number found for gray out of 400 divided by 400?
If it does, celebrate! If not, try again. . . The great part is that you can check yourself! 
The answer should be 75 gray sweatshirts using the method that JJ explained.