Question

what should be subtracted from 5 upon 9 to give 4 upon 21​

Answer 1

Let the number be x.

According to the question,

$\frac{5}{9} - x = \frac{4}{21}$

$= > \frac{5}{9} - \frac{4}{21} = x$

$= > \frac{35 - 12}{63} = x$

$= > \frac{23}{63} = x$

Hence, x or the number = 23/63.