Takes an amount and a total and calculates the percentage. It then returns a string with the percentage and "%".
/**
* Calculate percentage and returns as string
* @param {number} amount - amount count
* @param {number} total - max total
* @return {string} - returns templated string percentage with '%'
*/
const percentageMath = (amount, total) => {
return `${Math.round((amount / total) * 100)}%`;
}