Сокращение дробей

a) $$\frac{4a}{12b} = \frac{4 \cdot a}{4 \cdot 3 \cdot b} = \frac{a}{3b}$$

b) $$\frac{8xy}{2xz} = \frac{2 \cdot 4 \cdot x \cdot y}{2 \cdot x \cdot z} = \frac{4y}{z}$$

c) $$\frac{10m^2}{1.5m^3} = \frac{10 \cdot m^2}{1.5 \cdot m^2 \cdot m} = \frac{10}{1.5m} = \frac{100}{15m} = \frac{5 \cdot 20}{5 \cdot 3m} = \frac{20}{3m}$$