Question

what should be added to 7/12 to get -4/15​

Answer 1

Answer:

153/180................is your answer...simply just multiply 15 with 7 and 12 with -4 you'll get 153 and in denominator multiply 12 and 15 you'll get 180

Answer 2

Let the number added to $\frac{7}{12}$ be $x$.

Now ⇒

$x+\frac{7}{12} = \frac{-4}{15}$

$x = \frac{-4}{15} -\frac{7}{12}$

$LCM = 60$

$x = \frac{-4*4}{15*4} - \frac{7*5}{12*5}$

$x =\frac{-16}{60} - \frac{35}{60}$

$x = \frac{-51}{60}$

$x = \frac{-17}{20}$

Now we have to check if $x = \frac{-17}{20}$

$\frac{-17}{20} + \frac{7}{12}$

$LCM = 60$

$\frac{-17*3}{20*3} + \frac{7*5}{12*5}$

$\frac{-51}{60} +\frac{35}{60}= \frac{-16}{60}$

$\frac{-16}{60} = \frac{-4}{15}$

∴ $x = \frac{-17}{20}$

∴ $\frac{-17}{20}$ should be added to $\frac{7}{12}$ to get $\frac{-4}{15}$