Question

The product of two rational numbers is -21/8. If one of the numbers is 4/5, find the other number.​

Answer 1

Step-by-step explanation:

$\frac{ - 21}{8} \div x = \frac{4}{5} \\ \\ x = \frac{4}{5} \times \frac{ - 21}{8} \\ \\ x = - \frac{ - 21}{10}$

Answer 2

Answer:

Let the required number be x. Then,

Let the required number be x. Then,=(5/7)+x=(4/21)

Let the required number be x. Then,=(5/7)+x=(4/21)By sending (5/7) from left hand side to the right hand side it change to −(5/7)

Let the required number be x. Then,=(5/7)+x=(4/21)By sending (5/7) from left hand side to the right hand side it change to −(5/7)x=(4/21)−(5/7)

Let the required number be x. Then,=(5/7)+x=(4/21)By sending (5/7) from left hand side to the right hand side it change to −(5/7)x=(4/21)−(5/7)LCM of 21 and 7 is 21

Let the required number be x. Then,=(5/7)+x=(4/21)By sending (5/7) from left hand side to the right hand side it change to −(5/7)x=(4/21)−(5/7)LCM of 21 and 7 is 21Express each of the given rational numbers with the above LCM as the common denomina

Step-by-step explanation:

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