minQuantity.js

function gcd (x, y) {
	let _gcd = (a, b) => (b === 0 ? a : _gcd(b, a % b));
	return _gcd(Math.abs(x), Math.abs(y));
}

function lcm (x, y) {
	return (x === 0 || y === 0) ? 0 : Math.abs(Math.floor(x / gcd(x, y)) * y);
}

function minQuantity(values = []) {
	values = values.map((n) => Math.round(1 / n));
	return lcm(...values);
}