Step 1: Start with the fraction 15/70.

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

15 ÷ 70 = 0.2143

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

0.2143 × 100 = 21.43%

Final Answer: 15/70 as a percentage is 21.43%.