/**
 * Get the percentage of a discount
 *
 * @param {number} oldPrice   Original price. Can be formatted price or a integer value.
 * @param {number} newPrice   Price with discount. Can be formatted price or a integer value.
 * @param {number} [length=0] Number of decimals
 *
 * @returns {bollean|number}
 *
 * @example
 *  getPercentage(17990, 14900, 2); // 17.18 (17.18% OFF)
 */
declare const getPercentage: (oldPrice: number, newPrice: number, length?: number) => number | false;
export default getPercentage;