This "tool code" is just regular Highcharts code, and does nothing more than generate it for you.

For the first chart you can use valueSuffix to add a percentage sign after the value. Code:

plotOptions: {
    column: {
        tooltip: {
            valueSuffix: '%'

For the second chart you can use the global thousandSep option to get comma separators. Code:

    lang: {
        thousandsSep: ','

See this JSFiddle demonstration of both code segments.

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