Question

What rational number should be substracted from -9/25 to get 7/10.​

Answer 1

Answer:

-9/25 -x= 7/10

-x=7/10+9/25

-x= 53/50

x=-53/50

so the rational no. is -53/50

Answer 2

Solution :-

Let the number to be subtracted be x, then

$\frac{-9}{25} - x = \frac{7}{10}$

x = $\frac{7}{10} + \frac{9}{25}$

x = $\frac{35}{50} + \frac{18}{50}$(LCM of 10 and 25 = 50)

x = $\frac{35 + 18}{50}$

x = $\frac{53}{50}$

Therefore, $\frac{53}{50}$ is the required rational number.

Hope it will help you.