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greeneyes<3

Find the percent of change. From 4000 ft^2 to 3990 ft^2 (my answer: 1%) Check/correct my answer? :)

  • one year ago
  • one year ago

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  1. Xavier
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    How did you get that value?

    • one year ago
  2. greeneyes<3
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    i divided 3990/4000, and rounded .9975 to 1%

    • one year ago
  3. Xavier
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    To find the percent change is to see how much the value changed compared to the old value. \[\%\ change = \frac{new-old}{old}*100\] Also 0.9975 is 99.75% which would round to 100% which is wrong.

    • one year ago
  4. greeneyes<3
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    okay thank you this makes much more sense!!! I havent done alg in a year...

    • one year ago
  5. greeneyes<3
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    is the answer 25%??

    • one year ago
  6. Xavier
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    You did the equation correctly but interpreted it incrorrectly. The equation takes care of converting from decimal value to percent. So when you got 0.25 that did not mean 25% but 0.25%. You can remove the 100 from the equation above to make it return the decimal

    • one year ago
  7. greeneyes<3
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    oh okay so .25% ?

    • one year ago
  8. Xavier
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    It may have been negative but I believe percent change is taken as the absolute value so that should be fine.

    • one year ago
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