/**
 * Calculates the discount amount based on percentage
 * @param originalAmount - Original price/amount
 * @param discountPercentage - Discount percentage (0-100)
 * @returns The discount amount
 */
export declare function calculateDiscountAmount(originalAmount: number, discountPercentage: number): number;
/**
 * Calculates the final amount after applying discount
 * @param originalAmount - Original price/amount
 * @param discountPercentage - Discount percentage (0-100)
 * @returns The final amount after discount
 */
export declare function calculateFinalAmount(originalAmount: number, discountPercentage: number): number;
/**
 * Validates if a discount percentage is valid
 * @param discountPercentage - Discount percentage to validate
 * @returns True if valid, false otherwise
 */
export declare function isValidDiscountPercentage(discountPercentage: number): boolean;