Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the % similarity to C7orf38 of the animal whose % identity to C7orf38 is 81?

### Inputs:
table_name: table, columns: ['Common Name', 'Genus & Species', 'NCBI Accession Number', 'Length (AA)', '% Identity to C7orf38', '% Similarity to C7orf38']

### Response:
SELECT MAX % Similarity to C7orf38 FROM table WHERE % Identity to C7orf38 = 81