Rocket.Chat/client/lib/getLocalePercentage.ts

export const getLocalePercentage = (
	locale: string,
	total: number,
	fraction: number,
	decimalCount = 2,
): string => {
	const option = {
		style: 'percent',
		minimumFractionDigits: decimalCount,
		maximumFractionDigits: decimalCount,
	};

	return new Intl.NumberFormat(locale, option).format(fraction / total);
};