export declare function roundTo(n: string | number, decimals?: number): number;
export declare function roundToFixed(n: string | number, decimals?: number): string;
export declare function roundToCeil(n: number | string, decimals?: number): number;
export declare function roundToFloor(n: number | string, decimals?: number): number;
export declare function getVariation(past: number | string, now: number | string): number;
export declare function nz(x: number, y: number): number;
export declare function countDecimals(x: number): number;