What is -(5)/(8) ÷ (9)/(10)

Question

What is -
`(5)/(8)` ÷
`(9)/(10)`

Answer 1

`\boxed{(a)/(b)/(c)/(d)=(a)/(b)\cdot(d)/(c)}\\\\-(5)/(8)/(9)/(10)=-(5)/(8)\cdot(10)/(9)=-(5\cdot10)/(8\cdot9)=-(50)/(72)=-(50:2)/(72:2)=-(25)/(36)`