Answer:
14.28%
Explanation:
I'm not sure if it's right but this is how I worked it out,
the box's contents are 4.2 pounds in total,
therefore in a fraction it would be 6/42
you turn a fraction into a percentage you do the numerator divided by the denominator
6รท42=0.142857(decimal form)
now you just turn it into a percentage
14.28%
please correct me if I'm wrong