Question

two rational number multiplication is -15/21 one 3/7 the another number is what​

Answer 1

"The product of two rational numbers is rational."

So, multiplying two rationals is the same as multiplying two such fractions, which will result in another fraction of this same form since integers are closed under multiplication. Thus, multiplying two rational numbers produces another rational number.

Answer 2

Answer:

-5/3

Step-by-step explanation:

product= -15/21

first number= 3/7

second number= product/ first number

=(-15/21) / (3/7)

=-5/3