math question calculation (percentages)

[naxo]

Hi:
To anybody who knows or are math experts, if i do this calculation for percentages:

3000 megabytes -----------100 %
x megabytes ----------- 50 %

it should be calculated as follows:

3000 * 50/100 = 1500

In programming for example to make progress install, how do you translate pure maths formula to lua? its correct write this as is it on the text progress ( for example or anywhere )?

[Shrek]

X [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]5[/COLOR]
Y [COLOR="#FF0000"]=[/COLOR] [COLOR="#000000"]10[/COLOR]
Z [COLOR="#FF0000"]=[/COLOR] [COLOR="#0000FF"]math.floor[/COLOR](X[COLOR="#FF0000"]/[/COLOR]Y [COLOR="#FF0000"]*[/COLOR] [COLOR="#000000"]100[/COLOR])
Dialog[COLOR="#FF0000"].[/COLOR]Message([COLOR="#800080"]""[/COLOR][COLOR="#FF0000"],[/COLOR]Z[COLOR="#FF0000"]..[/COLOR][COLOR="#800080"]"%"[/COLOR])

[naxo]

Thanks mate, very helpful the idea to assigning number variables solves directly any number needed to calculate for