Step 1: Start with the fraction 45/70.

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

45 ÷ 70 = 0.6429

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

0.6429 × 100 = 64.29%

Final Answer: 45/70 as a percentage is 64.29%.