SOLUTION: Collin is collecting rocks for a science project. So far, he has collected 36 rocks, which is 90% of the total he needs. How many more rocks does Collin need for his science projec

Algebra ->  Statistics  -> Density-curves-and-normal-distributions -> SOLUTION: Collin is collecting rocks for a science project. So far, he has collected 36 rocks, which is 90% of the total he needs. How many more rocks does Collin need for his science projec      Log On


   

Question 1035709: Collin is collecting rocks for a science project. So far, he has collected 36 rocks, which is 90% of the total he needs. How many more rocks does Collin need for his science project?
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
36 is 90%
36/.9 = 40
100% = 40.
90 of 40 is the original 36