/**
 * Generates a random number with a specified length.
 *
 * @param {number} [length=8] The length of the random number to generate.
 * @returns {number} A random number with the specified length.
 */
export declare function randomNumber(length?: number): number;
/**
 * Calculates a percentage from a total value and a value to calculate from.
 *
 * @param total The total value.
 * @param calculateFrom The value to calculate the percentage from.
 * @returns The percentage as a number (0-100). If total is zero, returns 0.
 */
export declare function numberPercentage(total: number, calculateFrom: number): number;