When you have a negative number, the higher it is, the lower it's value. So, the highest negative number, -3,816, will be first. -2.21 is less than 2.2, so it will go second with -2.2 right after. 3 is the only positive number, so it will go last. This makes the final order -3,816, -2.21, -2.2, 3.