Question

What should e subtracted from 19/17 to make it -13/15

Answer 1

Let the number which subtracted from 19/17 is @
so, 19/17-@= -13/15
so -@=-13/15-19/17
@=13/15+19/17

@=(221+285)/225
@=506/225

Answer 2

let x number be subtracted from 19/17 to get -13/17
then 19/17-x=-13/17
-x=-13/17-19/17
x=32/17