How to implement horizontal bar chart with percentage in echarts

var data = [220, 182, 191, 234, 290, 120, 65, 444];
var barWidth = 20;
var maxNum = 0;
for (var i = 0; i < data.length; i++) {
    if (data[i] > maxNum) {
        maxNum = data[i];
    }
}
 
option = {
    backgroundColor: 'black',
    grid: {
        top: '10%',
        left: '20%',
        right: '10%',
        bottom: '0%',
    },
 
    title:
        text: 'Percentage column',
    },
    xAxis:
        show: false,
    },
    yAxis: {
        data: data.map((item, index) => `data ${index}`),
        splitLine: {
            show: false,
        },
        axisLabel: {
            textStyle: { fontSize: '80%', color: '#02afff' },
        },
        axisLine: {
            show: false,
        },
        axisTick: false,
    },
    series: [
        {
            type: 'bar',
            barWidth: barWidth,
            zlevel: 2,
            data: data.map(function (item) {
                return {
                    value: item,
                    maxNum: maxNum,
                };
            }),
            label: {
                show: true,
                position: 'inside',
                // distance: 80,
                align: 'center',
                formatter: function (params) {
                    // return params.data.realValue;
                    var percent = Number((params.data.value / params.data.maxNum) * 100).toFixed(2) + '%';
                    return percent;
                },
                color: '#fff',
                fontSize: 12,
            },
            itemStyle: {
                borderRadius: 10,
                color: new echarts.graphic.LinearGradient(0, 1, 1, 1, [
                    { offset: 0, color: '#395CFE' },
                    { offset: 1, color: '#2EC7CF' },
                ]),
            },
        },
        {
            type: 'bar',
            barWidth: barWidth,
            barGap: '-100%',
            data: data.map(function (item) {
                return {
                    realValue: item,
                    value: maxNum,
                };
            }),
            label: {
                show: true,
                position: 'right',
                distance: 80,
                align: 'right',
                formatter: function (params) {
                    return params.data.realValue + 'item';
                },
                color: '#02afff',
                fontSize: 18,
            },
            itemStyle: {
                borderRadius: 10,
                color: 'rgba(3,169,244, 0.5)',
            },
        },
    ],
};