# math

posted by
**deb** on
.

calculate the average percent

1970 1980 1990 2000

17.2 17.3 17.1 16.6

do you add them all together then divide by 4

posted by
**deb** on
.

calculate the average percent

1970 1980 1990 2000

17.2 17.3 17.1 16.6

do you add them all together then divide by 4