Step 1: Start with the fraction 51/70.

Step 2: To convert a fraction into a percentage, divide the numerator by the denominator.

51 ÷ 70 = 0.7286

Step 3: Multiply the result by 100 to get the percentage.

0.7286 × 100 = 72.86%

Final Answer: 51/70 as a percentage is 72.86%.