Question

Calulate 1 and 4 over 5 -1 third over 2 and 2 fifth


`1 (4)/(5 ) - (1)/(3 ) \\ 2 (2)/(5)`

Answer 1

`(1(4)/(5)-(1)/(3))/(2(2)/(5))=\left(1(4\cdot3)/(5\cdot3)-(1\cdot5)/(3\cdot5)\right):\left(2(2)/(5)\right)=\left(1(12)/(15)-(5)/(15)\right):(2\cdot5+2)/(5)\\\\=1(12-5)/(15):(12)/(5)=1(7)/(15)\cdot(5)/(12)=(1\cdot15+7)/(15)\cdot(5)/(12)=(22)/(15)\cdot(5)/(12)=(11)/(3)\cdot(1)/(6)\\\\=(11)/(18)`