One half percent of 70 is calculated by converting the percentage to a decimal and then multiplying it by 70.
First, convert one half percent to a decimal:
1/2% = 0.5%
Next, convert 0.5% to a decimal by dividing by 100:
0.5% ÷ 100 = 0.005
Finally, multiply the decimal by 70:
0.005 × 70 = 0.35
Therefore, one half percent of 70 is 0.35.