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i am in 4th grade doing my sisters homework don't ask why but i need help on this question.
-- Explain why the cost of an item discounted 20% can be calculated by multiplying the original price by 0.8

  • MATH -

    100% - 20% = 80% = 0.8

    When an item says it's 20% off, then the new price is 80% of the original price.

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