Question

Which rational numbers should be added to `(-7)/8` to get `5/9`?

Answer 1

Required rationa number = `5/9 - ((-7)/8)`

`= 5/9 + 7/8`

2	9, 8
2	9, 4
2	9, 2
3	9, 1
3	3, 1
	1, 1

`therefore` LCM of 9 and 8 = 2 x 2 x 2 x 3 x 3 = 72

`= (5xx8)/(9xx8) + (7xx9)/(8xx9)`

LCM of 9 and 8 = 72

`= 40/72 + 63/72`

`= (40 + 63)/72 = 103/72 = 1 31/72`