March 28, 2017

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Tammy had 900 red and blue buttons in a big box. 30% of them were blue buttons . She sold some of the blue buttons in the afternoon and the percentage of blue buttons dropped to 25% . How many blue buttons were left

  • math - ,

    X = number sold

    .3(900) - x = .25(900-x)

    Solve for x and subtract from 900.

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