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

### Instruction:
What is the sum of completions that led to completion percentages of 65.4 and attempts under 451?

### Inputs:
table_name: table, columns: ['Year', 'Comp.', 'Att.', 'Comp%', 'Yards', "TD's", "INT's", 'Rating']

### Response:
SELECT SUM Comp. FROM table WHERE Comp% = 65.4 AND Att. < 451