To find out how many pounds of green squash Paul had, we first need to determine the weight of the yellow squash.
Since yellow squash made up \( \frac{1}{5} \) of the total harvest, we can calculate the weight of the yellow squash as follows:
\[ \text{Weight of yellow squash} = \text{Total weight} \times \frac{1}{5} = 42.2 \times \frac{1}{5} \]
Calculating this:
\[ 42.2 \div 5 = 8.44 \text{ pounds} \]
Now, to find the weight of the green squash, we subtract the weight of the yellow squash from the total weight:
\[ \text{Weight of green squash} = \text{Total weight} - \text{Weight of yellow squash} \]
\[ \text{Weight of green squash} = 42.2 - 8.44 \]
Calculating this gives:
\[ 42.2 - 8.44 = 33.76 \text{ pounds} \]
So, Paul had \( 33.76 \) pounds of green squash.