Выполните действие (1 - 4/9) ÷ (1/3 - 1/4 )

Question

Выполните действие (1 - 4/9) ÷ (1/3 - 1/4 )

Answer 1

(1-4/9)÷(1/3-1/4)=(9/9-4/9)÷(4/12-3/12)=
5/9:1/12=5/9×12/1=20/3=6 2/3.