The length is 12, because if it's 9 inches wide it has two sides of 9 inches which is 18. Then subtract that from the intial value 42 to get 24. After, you divide 24 by 2 due to there being 2 sides of the box and 24 is the sum of both sides. Hopethis helps!
Answer:
106,000
Step-by-step explanation:
15.6 - 11.7 = 3.9
3.9 ÷ 15.6 = .25
25% of change
