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Mathematics 7 Online
OpenStudy (anonymous):

7/9=?/54

OpenStudy (anonymous):

use cross multiplication

OpenStudy (anonymous):

do you know what that is?

OpenStudy (anonymous):

if not multiply 7 by 54 and 9 by x

OpenStudy (anonymous):

so you have 54(7)=9x

OpenStudy (anonymous):

simplify from there

OpenStudy (anonymous):

the answer is 42

OpenStudy (anonymous):

there is also another way to solve this

OpenStudy (anonymous):

\[{7\over9}={?\over54}\]lets say the \(?\) is \(x\):\[{7\over9}={x\over54}\]now multiply the numerator of each by the denominator of the other:\[7\times 54=9\times x\]simplify\[378=9x\]divide by 9:\[x=42\]hope thats helpful! :)

OpenStudy (anonymous):

from the beginning you can simplify 7/9 to .777777777778 :) then multiply that by 54

OpenStudy (anonymous):

ill give you best response yumyum :)

OpenStudy (anonymous):

oh cool thanks! :D

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