Question

the product of two rational number is -15/28 . if one of them is -18/7, find the other​

Answer 1

Answer:

$let \: the \: other \: no. \: be \: x \\ \frac{ - 18}{7} \times x = \frac{ - 15}{28} \\ - 18x = \frac{ - 15}{28} \times 7 \\ - 18x = \frac{ - 15}{4} \\ x = \frac{15}{4} \times \frac{1}{18} \\ x = \frac{5}{24}$

Hence the other number is 5/24

Answer 2

let the other rational number be x

x × -18/7=-15/28

x=-15x-7/28x18

x=105/504

therefore the rational number is 105/504