Question

what should be subtracted from -5/12 to get -13/24​

Answer 1

$Let \: \: the \: \: unknown \: \: number \: \: be \: \: x$

Then,

$\frac{ - 5}{12} - x = \frac{ - 13}{24} \\ \\ \frac{ - 5}{12} + ( \frac{ - 13}{24}) = x \\ \\ \frac{ - 10 + ( - 13)}{24} = x \\ \\ \frac{ - 10 - 13}{24} = x \\ \\ \frac{ - 23}{24} = x$