Answer:
25%
Step-by-step explanation:
As the given situation the parameters are below:-
Cost of each box = 3 pounds
Amount of cereal in each box = 160 g
now,
160 g of cereal = 100%
and
25% of 1 box of cereal = 25% of 160 g which is
[tex]= \frac{25}{100} \times 160 g= 40 g[/tex]
As per the question, it is mention that Jane need her idea to give the equal value of amount as Tim's idea, provided
160 g of cereal costs 3 pounds
and
1 g of cereal will cost
= [tex]\frac{3}{60}\ pounds[/tex]
40 g of cereal will cost [tex]40\times \frac{3}{160} = \frac{3}{4}\ pounds[/tex]
So, the percentage of [tex]\frac{3}{4}[/tex] the pound is of 3 pounds is 3 ÷ 4 ÷ 3 × 100
= 25%
Therefore as the situation, Jane need to decline the amount by 25% for the same amount as Tim's idea.