Rounding multiple times while not losing remainders in Javascript

multiRound.js

/*
 *  Return the rounded number and the new remainder using past remainder. 
 *
 * @param {number} number  The number that needs to be rounded
 * @param {number} priorRemainder The remainder that is left over from last time that needs to be added to the calculation
 */
function multiRound(number, priorRemainder) {
    var floored = Math.floor(number + priorRemainder);
    var difference = (number + priorRemainder) - floored;
    return {
        number : floored,
        remainder : difference
    };
}

/*
 *  Demonstrate rounding of an array
 *
 * @param {Array} arr  A list of numbers to be rounded
 * @returns {Array} New array with adjusted numbers
 */
 
function roundArray(arr) {
    var globalRemainder = 0;
    return arr.map(function(item){
        var result = multiRound(item, globalRemainder);
        globalRemainder = result.remainder;
        return result.number
    });
}

/* Now try it */
var arr = [1.1, 2.2, 3.3, 4.4, 5.5, 6.6];
var newArr = roundArray(arr);

/* Result should be [1, 2, 3, 5, 5, 7] */