To convert the mass of the crate of bananas from dekagrams to centigrams, you need to understand the relationship between the units.
1 dekagram = 100 centigrams
So, to convert dekagrams to centigrams, you multiply the number of dekagrams by 100.
Given that the mass of the crate of bananas is 674.8 dekagrams:
\[ 674.8 , \text{dekagrams} \times 100 , \text{centigrams/dekagram} = 67,480 , \text{centigrams} \]
Therefore, the mass of the crate of bananas is 67,480 centigrams.