Math

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How do I solve this?

There are 171 seventh graders eating lunch. This number represents 45% of all of the seventh grades. How many 7th graders are there in the school?

Would I take 171 x 45% and add them together or take 171 X .55 or??

  • Math -

    Do you know algebra?

    let the number of students be x

    .45x = 171
    x = 171/.45
    x = 380

    or do it by the "3 step process"

    45% represents 171
    so 1% = 171/45 = 3.8
    100% = 100*3.8 = 380

  • Math -

    How do I solve this word problem
    to do with fractions ro


    What is one seventh of 6.3?

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