just posting the link here to the question i had posted yesterday!

Ok rosala, I'll have a go, though I doubt I will do better than Melody did!

The question is If √(0.09 * 0.9 * x) = 0.9 * 0.09.√y , then find x/y

First let's simplify how it looks by calculating 0.09*0.9

$${\mathtt{0.09}}{\mathtt{\,\times\,}}{\mathtt{0.9}} = {\frac{{\mathtt{81}}}{{\mathtt{1\,000}}}} = {\mathtt{0.081}}$$

Now replace 0.09*0.9 in the original equation wherever it occurs (noting that 0.9*0.09 is the same as 0.09*0.9)

√(0.081*x) = 0.081*√y

Now square both sides of the equation

Left-hand side:  (√(0.081*x))² = 0.081*x                            ...(1)

Right-hand side:  (0.081*√y)² = 0.081²*(√y)² = 0.081²*y   ...(2)

Equate (1) and (2)

0.081*x = 0.081²*y

Divide both sides by 0.081

x = 0.081*y

Divide both sides by y

x/y = 0.081

Is this any clearer?

Thanks Alan

Your idea of simplfying the numbers as you go will probably be much better for Rosala.

Maybe i should go back an incorporate it into my answer.  Normally I would but the numbers cancelled out so nicely that I didn't force myself to do it that way.  :)

I think i will wait till she comments more.      

thank you very much alan!thats just gave me the idea of what the question is otherwise it was looking as if only Einstein could solve this!and melody im glad i didnt require to trouble u more as alan took all of it!lol!

points from me for both of you!Thank you!