it equals 54
16 20 equal to in fraction = 16/20 or 4/5
16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238
18/20= .9
18-(-16) = 34
5
16/18 = 8/9
Four fives do not equal 18 - they equal 20.
18/20 = 180/200
-2
4n + 2 = 8n - 16 18 = 4n n =4.5 Check: 4 x 4.5 = 18, 18 + 2 = 20, 8 x 4.5 = 36, 36 - 16 = 20. QED
It is equal to 3/20
The mode is 16.