For the nth time, please style your code before posting it in the scripting forums.
If the map is to be 100x100 pixels, and the actual map is 12x12 levels, you can calculate that the map is 768x768 tiles (64 tiles in a row/column per level).

is the number of pixels each tile represents on your map horizontally (the same vertically if it's a square).
Then, to figure out where to draw markers,
PHP Code:
function getMarkerPosition(temp.tileX, temp.tileY) {
return {
(100 / 768) * temp.tileX,
(100 / 768) * temp.tileY
};
}
All you're doing is multiplying the number of pixels each tile represents,

, by the number of tiles.