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how do you convert transperancy into a percent out of one hundred,
like 0.01 = 1% and 0.47 = 47%

yup, that's exactly it
0 = 0% and 1 = 100%

0.5 = 50 %
0.345 = 34.5 %

and so on =D

it would be to long of a code, can you tell me how to make it shorter?

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var = transp*100;

so it'll just turn var into a basic number, there is no percent expression in the GE language.

Here is a sample code that would do it. It is from my Health Bar demo, but the concept should work the same.

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sprintf(texthealth.text,"%d%%",Goober.health);

Replace Goober.health with your transparency increased *100 variable.