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I reduced a diagram on my computer using a scale factor of 8o%(i.e. the linear dimensions of the diagram were reduced so they became 80% of the original dimensions). What scale factor is required to return the diagram to original size?

  • Algebra -

    say we had a line 10 cm long
    after reduction it is 8 cm long
    now to get back to ten:
    10 = scale factor * 8
    10/8 = 1.25

    That is the trouble with the %^&* stock market :)
    If you lose 20%
    You need to gain 25% to get back where you were :)

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