Question

add -2/5×15/4 by the reciprocal of 4/13×-39/5​

Answer 1

-2/5×15/4=-2×15/5×4=-3/2

4/13×-39/5=-4×39/13×5=-12/5

reciprocal -12/5=-5/12

addition :

-3/2+(-5/12)=-3/2-5/12

LCM of 2,12=12

=-18/12-5/12

=-18-5/12

=-23/12