Salutations!
Round 13.989 to the nearest tenth
To round the number to the nearest tenth, you need to know whether the number next to the tenth's place is greater than 5 or lesser than 5. If its greater than 5, you need to round up. If its lesser than 5, you need to round down.
→ 13.986 rounded to the nearest tenth is ≈ 14.
Hope I helped (:
Have a great day!