/**
 * Reduces a fraction to its lowest terms
 * @param  {number} x Numerator
 * @param  {number} y Denominator
 * @returns {{x: number, y: number, gcd: number}} Reduced fraction and the GCD
 * @example reduce(2, 4); // {x: 1, y: 2, gcd: 2}
 * @description
 * Returns an object containing:
 * - x: reduced numerator
 * - y: reduced denominator
 * - gcd: greatest common divisor used for reduction
 */
export declare const reduce: (x: number, y: number) => {
    x: number;
    y: number;
    gcd?: undefined;
} | {
    x: number;
    y: number;
    gcd: number;
};