Question

By what rational number should be multiply 12 upon 5 to get - 72 upon 25​

Answer 1

$\frac{12}{5} \times x = \frac{ - 72}{25} \\ \\ x = \frac{ - 72}{25} \times \frac{5}{12} \\ \\ x = \frac{ - 360}{300} \\ \\ x = \frac{ - 120}{100} \\ \\ x = \frac{ - 6}{5}$

So,

$\frac{ - 6}{5} \: should \: be \: multiply\: to \: \frac{12}{5} \\ to \: get \: \frac{ - 72}{25}$