Answer:
2 : 3
Step-by-step explanation:
[tex]\frac{3}{5}[/tex] of the pens are red , then [tex]\frac{2}{5}[/tex] are green
ratio of green : red = [tex]\frac{2}{5}[/tex] : [tex]\frac{3}{5}[/tex] ( multiply both parts by 5 to clear the fractions )
green : red = 2 : 3
