Glenn has 450 stamps that are red blue green. 52% are red. He has 3/5 as many green as blue stamps. How many are blue and how many are green.

Since it is already stated that 52% of the 450 stamps are red (which is 234), the remaining 216 stamps are composed of blue and green stamps only. From there, we can write the equation:

216 = b + g

where: b = blue stamps; g = green stamps

Applying the relation that the green stamps are 3/5 as much as the blue stamps, we can say that g = 3/5 b

Substituting the relation to the equation:

216 = b + 3/5 b

216 = 8/5 b

Dividing both sides by 8/5:

216 / (8/5) = 8/5 b / (8/5)

b = 135.

Going back to the equation and substituting the value of b:

216 = b + g

216 = 135 + g

Subtracting 135 from both sides to get g:

216 - 135 = 135 - 135 + g

g = 81

Therefore, there are 135 blue stamps and 81 green stamps.