Posted by **Brandon** on Thursday, August 11, 2011 at 9:31pm.

What number must be added to the numerator and denominator of the fraction 7/19 to make the resulting fraction qual to 3/4?

- Algebra -
**Ms. Sue**, Thursday, August 11, 2011 at 9:35pm
3/4 = 15/20

- Algebra -
**Henry**, Friday, August 12, 2011 at 6:18pm
(7+x) / (19+x) = 3/4,

Cross multiply:

28 + 4x = 57 + 3x,

4x - 3x = 57 - 28,

X = 29.

Check: (7+29)/(19+29) = 36/48 = 3/4.

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