Question

divide the sum of -3/4 and -5/12 by their product.

Answer 1

sum of -3/4 and -5/12 = (-3/4) + (-5/12)
                                = -3/4-5/12
                                = (-9-5)/12
                                = -14/12
                                = -7/6
product of -3/4 and -5/12 = (-3/4)(-5/12)
                                     = 5/16
Now, (-7/6)/(5/16) = -56/15 .
 

Answer 2

Firstly we have to add -3/4 and -5/12..................
=  -3/4 + -5/12
= now find the common denominator/Take the L.C.M of denominators

=L.C.M will be 12

=Now we have common denominator 12

= Common Denominator ÷ Denominator) x Numerator = New Numerator

= 1st fraction

= (12 ÷ 4) × -3 = -9

=-9/12

2nd Fraction

=(12 ÷ 12) × -5 = -5

= -5/12

= now add both fractions

=-9 + -5 = -14
   12   12    12

now multiplication

=-3     ×     -5     =     15  
   4            12            48

=now division

=-14/12  /  15/48 

=15 → 48           here we've do the reciprocal
  48    15

=then we have to multiply

= -14 × 48 = -672
    12   15     180

answer will be   -672
                       180