How much is Two thirds of... (2/3) (1 \\ \\ )/(2) 2 / (3)/(5) (2)/(3) /(2)/(7) Does anyone have a good explanation? (Question in the book says no calculator allowed) Thanks! ​

Question

How much is Two thirds of... (2/3)


`(1 \\ \\ )/(2)`

`2 / (3)/(5)`

`(2)/(3) /(2)/(7)`
Does anyone have a good explanation?
(Question in the book says no calculator allowed)

Thanks! ​

Answer 1

it's so simple

use reciprocal trick