Answer :
kilograms or 1.775 kilograms
Explanation:
1. You know that:
- The weight of the baby otter was 7/8 kilograms.
- The weight of that baby otter is 9/10 kilogram less than the average weight of a newborn otter in the aquarium.
2. Keeping on mind the information given, let's call the average weight of a newborn otter x. Then, you can write the following expresion:

3. Solve for x. Then, you obtain the following result:

4. Thefore, the answer is
kilograms or 1.775 kilograms.