What is 400 decreased by 11 percent?

To find 400 decreased by 11 percent, we can use the formula:

```

Decreased Amount = Original Amount - (Original Amount * Percentage / 100)

```

In this case, the original amount is 400, and the percentage is 11.

```

Decreased Amount = 400 - (400 * 11 / 100)

```

```

Decreased Amount = 400 - (44)

```

```

Decreased Amount = 356

```

Therefore, 400 decreased by 11 percent is 356.