Question

9/10 divided by (1/10 plus 2/5)

Answer 1

1.8 is the answer

1/10+2/5 is equal to 0.5

That divided by 9/10 is 1.8 or 1 8/10

Answer 2

`\boxed{ ( (9)/(10) )/(( (1)/(10) + (2)/(5) )) = ( (9)/(10) )/( (1)/(2) ) = (9)/(10) . (2)/(1) = (18^(/2))/(10^(/2)) ~\to~\boxed{ (9)/(5)} }`