What number comes next
500,100,20,4

.8

Step-by-step explanation:

you just divide by 5 every time and 4/5 is .8

The opposite of a positive whole number will always be negative; hence the word opposite. The opposite of a number will be greater/less than its opposite depending  on which number you are comparing it to.. Ex: -3 the opposite of -3 is a positive 3. a positive is greater than a negative.