SOLUTION: What is the fraction? So, that it is equivalent to the fraction with the indicated denominator. 5/7 = ?/21

Question 4955: What is the fraction? So, that it is equivalent to the fraction with the indicated denominator.
5/7 = ?/21

Answer by Hungryfrog(2) (Show Source): You can put this solution on YOUR website!
You can solve these types of questions by cross-multiplying.
So --> 5 x 21 = 7 x n (I substituted n for ?)
That comes out to 105 = 7 n
Then you can divide each side by 7 to solve for n:
15 = n
So, you can rewrite it as 5/7 = 15/21
Those two fractions are equivalent.
RELATED QUESTIONS
build up each fraction or whole number so that it is equivalent to the fraction with the... (answered by fractalier,Nate)

Buildup each fraction or whole number so that it is equivalent to the fraction with the... (answered by fractalier)

How can I build up the fraction so that it is equivalent to the fraction with the... (answered by chessace)

find the improper fraction with a denominator of 6 that is equivalent to 5 1/2 (answered by nyc_function)

Find the improper fraction with the denominator of 12 that is equivalent to 10 1/4 (answered by josh_jordan,MathTherapy)

please help me :find the improper fraction with a denominator of 6 that is equivalent to... (answered by nyc_function)

Build the fraction into an equivalent fraction with the indicated denominator. Assume... (answered by josgarithmetic)

write the fraction as an equivalent with the indicated denominator 5/11 with a... (answered by mananth)

build each fraction or a whole number to an equivalent fraction having the idicated... (answered by rfer)