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math.. again!

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write each increase or decrease as a percent.
the price of gasoline rose from 97.5/L to 101.4/L.

Percent increase=

i did:
101.4 - 97.5
101.4 x 0.0390 = 3.9%

is this right?? im not really sure how to do this.sorry for all these questions.

  • math.. again! -

    To find the percent increase you need to divide the difference between it and the new number by the old number.

    101.4 - 97.5 = 3.90

    3.9 / 97.5 = 0.04 = 4%

    To check it, multiply: 97.5 * 0.04 = 3.90

    The price increased $3.90 which is a 4% increase.

  • math.. again! -

    thanks so much!! i hate to bother u i have too many questions.:(

  • math.. again! -

    That's not a problem, Jazz. We are all here to help students and feel good when a student understands something we explain. :-)

  • math.. again! -

    aww ur the best!!! :)))

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