Question

If there are $0.90 (US) to €1.00 how many euro would u get for $9.00 (US) ?

Answer 1

Wouldn't the answer be 10 euros
$.90x10 = $9
1x10 = 10

Answer 2

$\frac{.9}{1} = \frac{9}{x}$    Solve for x.

.9x=9*1    Divide both sides by .9

x=$\frac{9}{.9}$=10

You would get 10.00 euros.

You can also think of it in this way, that you just move the decimal point over one to the left to get 10.