1. Problem: Erweitere $\frac{3}{4}$ mit 2. 2. To "erweitern" a fraction means to multiply numerator and denominator by the same number, which does not change the value of the fraction. 3. Multiply numerator and denominator of $\frac{3}{4}$ by 2: $$\frac{3}{4} = \frac{3 \times 2}{4 \times 2}$$ 4. Calculate: $$\frac{3 \times 2}{4 \times 2} = \frac{6}{8}$$ 5. Final answer: $\frac{6}{8}$