RRB Group D 1 Dec 2025 Shift 2 Solved Paper

Concept:To find what percentage one number is of another, divide the first number by the second and multiply the result by 100.Explanation:Let the first number be $\frac{1}{20}$ and the second number be $\frac{10}{70}$.Write the required percentage as $\left(\frac{\frac{1}{20}}{\frac{10}{70}}\right) \times 100\%$.Dividing by a fraction is the same as multiplying by its reciprocal:So we get $\frac{1}{20} \times \frac{70}{10} \times 100\%$.Simplify $\frac{70}{10} = 7$.Then $\frac{1}{20} \times 7 = \frac{7}{20}$.Now multiply $\frac{7}{20}$ by $100$: $\frac{7}{20} \times 100 = 7 \times 5 = 35$.Thus, $\frac{1}{20}$ is $35\%$ of $\frac{10}{70}$.Verify: $35\%$ means $0.35$, and $0.35 \times \frac{10}{70} = 0.35 \times \frac{1}{7} = 0.05 = \frac{1}{20}$, which matches.Answer:Option B: $35\%$.