To find the percentage of defective units, we first need to calculate the defect rate per unit of production:
Defect rate per unit = (Number of defects) / (Number of units of production)
Defect rate per unit = 29.2 / 7,300 = 0.004 (rounded to three decimal places)
Now, to find the percentage of defective production, we multiply the defect rate per unit by 100:
Percentage of defective production = Defect rate per unit * 100
Percentage of defective production = 0.004 * 100 = 0.4%
So, 0.4% of the production is defective.