您可以尝试跟踪由于舍入而产生的误差，如果累计误差大于当前数字的小数部分，则再反向舍入。

13.62 -> 14 (+.38)
47.98 -> 48 (+.02 (+.40 total))
 9.59 -> 10 (+.41 (+.81 total))
28.78 -> 28 (round down because .81 > .78)
------------
        100

不确定这是否适用于一般情况，但如果顺序相反，似乎也会有类似的效果:

28.78 -> 29 (+.22)
 9.59 ->  9 (-.37; rounded down because .59 > .22)
47.98 -> 48 (-.35)
13.62 -> 14 (+.03)
------------
        100

我相信在某些情况下，这种方法可能会失效，但任何方法都至少在某种程度上是任意的，因为您基本上是在修改输入数据。

下面是@varun-vohra答案的一个简单的Python实现:

def apportion_pcts(pcts, total):
    proportions = [total * (pct / 100) for pct in pcts]
    apportions = [math.floor(p) for p in proportions]
    remainder = total - sum(apportions)
    remainders = [(i, p - math.floor(p)) for (i, p) in enumerate(proportions)]
    remainders.sort(key=operator.itemgetter(1), reverse=True)
    for (i, _) in itertools.cycle(remainders):
        if remainder == 0:
            break
        else:
            apportions[i] += 1
            remainder -= 1
    return apportions

你需要math, itertools, operator。

因为这里没有一个答案似乎能正确解决这个问题，下面是我使用下划线的半模糊版本:

function foo(l, target) {
    var off = target - _.reduce(l, function(acc, x) { return acc + Math.round(x) }, 0);
    return _.chain(l).
            sortBy(function(x) { return Math.round(x) - x }).
            map(function(x, i) { return Math.round(x) + (off > i) - (i >= (l.length + off)) }).
            value();
}

foo([13.626332, 47.989636, 9.596008, 28.788024], 100) // => [48, 29, 14, 9]
foo([16.666, 16.666, 16.666, 16.666, 16.666, 16.666], 100) // => [17, 17, 17, 17, 16, 16]
foo([33.333, 33.333, 33.333], 100) // => [34, 33, 33]
foo([33.3, 33.3, 33.3, 0.1], 100) // => [34, 33, 33, 0]

或者像这样简单，你只需要累积误差…

const p = [13.626332, 47.989636, 9.596008, 28.788024];
const round = (a, e = 0) => a.map(x => (r = Math.round(x + e), e += x - r, r));
console.log(round(p));

结果:[14,48,9,29]

我用Javascript写了一个函数，它接受一个百分比数组，并使用最大余数方法输出一个四舍五入的百分比数组。它不使用任何库。

输入:[21.6,46.7,31,0.5,0.2]

输出:[22,47,31,0,0]

const values = [21.6, 46.7, 31, 0.5, 0.2]; console.log(roundPercentages(values)); function roundPercentages(values) { const flooredValues = values.map(e => Math.floor(e)); const remainders = values.map(e => e - Math.floor(e)); const totalRemainder = 100 - flooredValues.reduce((a, b) => a + b); // Deep copy because order of remainders is important [...remainders] // Sort from highest to lowest remainder .sort((a, b) => b - a) // Get the n largest remainder values, where n = totalRemainder .slice(0, totalRemainder) // Add 1 to the floored percentages with the highest remainder (divide the total remainder) .forEach(e => flooredValues[remainders.indexOf(e)] += 1); return flooredValues; }

我已经实现了Varun Vohra的答案在这里的列表和字典的方法。

import math
import numbers
import operator
import itertools


def round_list_percentages(number_list):
    """
    Takes a list where all values are numbers that add up to 100,
    and rounds them off to integers while still retaining a sum of 100.

    A total value sum that rounds to 100.00 with two decimals is acceptable.
    This ensures that all input where the values are calculated with [fraction]/[total]
    and the sum of all fractions equal the total, should pass.
    """
    # Check input
    if not all(isinstance(i, numbers.Number) for i in number_list):
        raise ValueError('All values of the list must be a number')

    # Generate a key for each value
    key_generator = itertools.count()
    value_dict = {next(key_generator): value for value in number_list}
    return round_dictionary_percentages(value_dict).values()


def round_dictionary_percentages(dictionary):
    """
    Takes a dictionary where all values are numbers that add up to 100,
    and rounds them off to integers while still retaining a sum of 100.

    A total value sum that rounds to 100.00 with two decimals is acceptable.
    This ensures that all input where the values are calculated with [fraction]/[total]
    and the sum of all fractions equal the total, should pass.
    """
    # Check input
    # Only allow numbers
    if not all(isinstance(i, numbers.Number) for i in dictionary.values()):
        raise ValueError('All values of the dictionary must be a number')
    # Make sure the sum is close enough to 100
    # Round value_sum to 2 decimals to avoid floating point representation errors
    value_sum = round(sum(dictionary.values()), 2)
    if not value_sum == 100:
        raise ValueError('The sum of the values must be 100')

    # Initial floored results
    # Does not add up to 100, so we need to add something
    result = {key: int(math.floor(value)) for key, value in dictionary.items()}

    # Remainders for each key
    result_remainders = {key: value % 1 for key, value in dictionary.items()}
    # Keys sorted by remainder (biggest first)
    sorted_keys = [key for key, value in sorted(result_remainders.items(), key=operator.itemgetter(1), reverse=True)]

    # Otherwise add missing values up to 100
    # One cycle is enough, since flooring removes a max value of < 1 per item,
    # i.e. this loop should always break before going through the whole list
    for key in sorted_keys:
        if sum(result.values()) == 100:
            break
        result[key] += 1

    # Return
    return result