Meal level to thumbs up conversion

these are the gourmet points u get when u have dish of following level

Level 1 = +1.0
Level 2 = +1.2
Level 3 = +1.4
Level 4 = +1.6
Level 5 = +1.8
Level 6 = +2.0
Level 7 = +2.2
Level 8 = +2.4
Level 9 = +2.6
Level10 = +2.8