Product of digits of numerator of subtraction of `((12)/(5) and (13)/(7)).`

Find the sum of digits of numerator and denominator of reciprocal of ((2)/(5)+(5)/(4))

Subtract : (-20) - (13)

The number which is subtracted from (27)/(13) to get (-3)/(7) , is

The product of digits of a two digit number is 30. When 9 is subtracted from the number,the digits interchange the places.Find the number.

Subtract : 7 3/7-6 2/5

Subtract: -5xyf or m12xy

Divide the sum of (13)/(5) and (-12)/(7) by the product of (-31)/(7) and (1)/(-2) .

Subtract the sum of (5)/(9) and -(3)/(11) from the difference of -(2)/(7) and (13)/(28) then the value is