Question

1. in a grocery store, the jumbo - sized boxes of berries decreased by 20%. if the old boxes held 40 ounces of berries, how much do the new boxes hold? (4)

the unknown, which represents the new jumbo - size boxes of berries, is labeled with a question mark on the double number line. write an equation to find the amount of berries the new jumbo - size boxes holds. (4)
berries (ounces)

0% 20% 40% 60% 80% 100% 120%

\\(\square\times\square = \square\\)
? 40 80%

Explanation:

Step1: Determine the percentage of the new amount

The original amount is 100% of the old boxes. Since it decreased by 20%, the new amount is \(100\% - 20\% = 80\%\) of the old amount. In decimal form, \(80\% = 0.8\).

Step2: Set up the equation

The old amount of berries is 40 ounces. To find the new amount, we multiply the old amount by the percentage of the new amount (in decimal). So the equation is \(40\times0.8=\text{new amount}\) (or using percentage, \(40\times80\%=\text{new amount}\)).

Answer:

The equation is \(40\times80\% = 32\) (or \(40\times0.8 = 32\)), so filling in the boxes: \(40\times80\% = 32\) (the first box is 40, the second is 80% (or 0.8), the third is 32).