declare class ProperFraction {
    readonly num: number;
    readonly den: number;
    private readonly rotation;
    /**
     *
     */
    constructor(num: number, den: number, rotation?: number);
    toString(): string;
    static sum(a: ProperFraction, b: ProperFraction): ProperFraction;
    reduce(): ProperFraction;
    hasReduction(): boolean;
    simplify(): ProperFraction;
    getCanvasDrawing(size: number): HTMLCanvasElement;
    getSquareCanvasDrawing(size: number): HTMLCanvasElement;
}
export default ProperFraction;
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