algebra! help!

In 1994 school lunch was $1.20. In 1999 it increased to $2.25. FInd the rate of change for school lunch from 1994-1999

asked by Katy
  1. Divide 6 into 2.25. The rate went up about .375 cents a year.

    posted by Gaby
  2. By what you said in the problem, I think you are trying to find a percent. In this case, you could set up an eqaution. Do you know cross multiplication. Well, just in case you don't, I'll show you.

    x/100 = 1.20/2.25

    Then what you would do is multiply 1.20 by 100, then divide by 2.25.
    And there's your answer!

    Hope I helped!

    posted by Celina
  3. ok thank you so much!!!

    posted by Katy
  4. Another way to solve this problem:

    2.25 - 1.20 = 1.05

    1.05 / 1.2 = 0.875 = 87.5%

    posted by Ms. Sue
  5. You're welcome. I'm glad I could help!

    posted by Celina

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