Trixie's BOB Ratio

Part to Part:

Greens to yellows
7:6
Yellows to blue
6:2
Blue 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)