Krystal's BOB Ratio

Part to Part:
Greens to Yellow
7:6
Yellows to Blue
6:2
Blues to Greens
2:7

Part-To-Total Ratios
Greens to total
5: 11
Yellows to total
6:11

Three-Part Ratios
Blues to Yellows to Greens
1:2:5
Reds:Blue:Yellows
3:5:2

Ratio Notation
Blues to Yellows- 1:2
Ratio- 1:2
Fraction- 1/2
Decimal- 0.5
Percent- 50%

Questions:

1. What is the percent for '2:7'? (Blue:Green)
2. What would be different if the total number of candies changes to 12?
3.What is the decimal for '7:6' (Green:Yellow)