Math help please?

If you have 427,657 people that speak Japenese in 1990 and it increased by 25% since 1980, how many people spoke Japenese in 1980? Please show me the steps. Thanks!

6 Answers

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  • J G
    Lv 4
    1 decade ago
    Favorite Answer

    Let's say that x people spoke Japanese then...

    Then now we'd have the same x people with an additional 0.25*x more people. So in total 1x + 0.25x = 1.25x

    And 1.25x is also 427, 657

    SO 1.25 x = 427, 657

    Divide by 1.25

    x = 342125.6 Ask your teacher who the .6 of a person was! Eeps!

  • Paul
    Lv 7
    1 decade ago

    Just multiply 427,657 by 1.25

    You know it increased by 25%, so the new number is going to be 125% of the old number.

    Crap... another math blunder... ok, it was 25% LESS, so you want to multiply it by 0.75!!!

  • 1 decade ago

    Let the 1980 population = x

    X *1.25 = 427,657

    X= 427,657/1.25

    X = 342,125.6

  • 1 decade ago

    25/100*427657

    =106914.25

    add this to actual amt

    106914.25 +427657

    = 534571.25

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  • 1 decade ago

    427,657 : 4 = 106,914.25

    427,657 - 106,914.25 = 320,742.75

  • 1 decade ago

    427657*.75?

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