Question

what should be added to the sum of 13/15 and 27/20 to get 91/60​

Answer 1

$x + \frac{13}{15} + \frac{27}{20} = \frac{91}{60}$

$x = \frac{91}{60} - \frac{13}{15} - \frac{27}{20}$

$x = \frac{91 - 5 - 81}{60}$

$x = \frac{91 - 133}{60}$

$x = \frac{ - 42}{60} - \frac{21}{30} - \frac{7}{10}$

$= > \frac{ - 7}{10}$