Question

What is the reciprocal of 2/9 ?

Answer 1

the reciprocal of a/b is b/a
just flip the fraction

Answer 2

It's actually \[\frac{ 1 }{ \left( \frac{ a }{ b } \right) } = \frac{ b }{ a }\]

Answer 3

So all a reciprocal is, \[\frac{ 1 }{ number }\]

Answer 4

two things to add on

1) if you have a mixed number, convert it to an improper fraction and then use the rule that @Nnesha wrote out

2) The value of 'a' cannot be zero. The value of 'b' cannot be zero. This is to avoid division by zero errors