The answer of this question is b
The nearest thousand is 547,000
ANSWER
The percentage decrease is 10.4%.
EXPLANATION
To calculate percentage decrease, use the formula,
Percentage decrease

Yesterday the price of coffee was 2.40. This is the old price.
Today the price is 2.15. This is the new price.




To the nearest tenth, we have:

Therefore the percentage decrease is 10.4%.
5 because this is equivalent to 9-4 which is 5 meters, this is because he is going up 9 and then goes down 4, do 9-4, which is 5