1. The problem asks: How much is $\frac{4}{5}$ heavier than $\frac{3}{4}$?\n\n2. To find how much one fraction is heavier than another, we subtract the smaller fraction from the larger fraction.\n\n3. The formula is: $$\text{Difference} = \text{Heavier} - \text{Lighter}$$\n\n4. Here, $\frac{4}{5}$ is heavier than $\frac{3}{4}$, so we calculate: $$\frac{4}{5} - \frac{3}{4}$$\n\n5. Find a common denominator for $\frac{4}{5}$ and $\frac{3}{4}$. The least common denominator (LCD) of 5 and 4 is 20.\n\n6. Convert each fraction: $$\frac{4}{5} = \frac{4 \times 4}{5 \times 4} = \frac{16}{20}$$ and $$\frac{3}{4} = \frac{3 \times 5}{4 \times 5} = \frac{15}{20}$$\n\n7. Subtract the fractions: $$\frac{16}{20} - \frac{15}{20} = \frac{16 - 15}{20} = \frac{1}{20}$$\n\n8. So, $\frac{4}{5}$ is $\frac{1}{20}$ heavier than $\frac{3}{4}$.