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

### Instruction:
Which Pct has Years of 1957–1970, and Wins smaller than 78?

### Inputs:
table_name: table, columns: ['Name', 'Years', 'Wins', 'Losses', 'Ties', 'Pct.']

### Response:
SELECT SUM Pct. FROM table WHERE Years = 1957–1970 AND Wins < 78