var Percent = function (value, min, max, upperMax){ 
if (max === undefined) { 
max = min + 1; 
} 
var percentage = (value - min) / (max - min); 
if (percentage > 1) { 
if (upperMax !== undefined) { 
percentage = ((upperMax - value)) / (upperMax - max); 
if (percentage < 0) { 
percentage = 0; 
} 
} 
 else { 
percentage = 1; 
} 
} 
 else if (percentage < 0) { 
percentage = 0; 
} 
return percentage; 
} 
; 
module.exports = Percent;