Final answer:
To determine the number of additional items that can be stored in Sam's warehouse, we calculate 41% of its total capacity, 357, which results in space for 146 more things.
Step-by-step explanation:
To calculate how many different things can still be placed in Sam's warehouse, we need to find the percentage of the warehouse that is currently unused. First, we'll add up the percentages of space taken by boxes, garbage, toys, and pictures. This will be 20% for boxes, 26% for garbage, 6% for toys, and 7% for pictures, totaling 59%. The capacity of the warehouse is for 357 different things. If 59% is occupied, then 100% - 59% = 41% of the warehouse is still available for storing more items. To find out how many items this percentage represents, we multiply the total capacity by the available percentage: 357 * 41% (or 0.41). This equals 146.37, but since you can't have a fraction of an item, we round down to the nearest whole number, which is 146 things.