I am trying to subtract 1 from a double with this code:

```
-(NSMutableArray *)getMoreTwitterDataWithMaxID:(double)maxID {
    double newestID = (maxID - 1);
    NSLog(@"newest ID is %f and maxID is %f", newestID, maxID);
    // other code
}

```

The console is spitting this out:

```
2012-05-15 11:21:14.693 nearYou[2570:3a03] newest ID is 202429657738522624.000000 and maxID is 202429657738522624.000000

```

I'm not sure why they aren't subtracting . . . 

Any help greatly appreciated!