Please see picture above.
=

Lets cancel the 0's with 0's
=
=450000
This would be a 4/5 ratio
The answer would be 12 orange because if their are 2 orange picks in 1 green pick, you would do 2 times 6 equals 12.

multiply f to the entire equation

add up right side


multiply uv to both sides

factor out f

divide (v+u) to both sides

substitute in u=3.5cm and v=-4 cm