We have been given that Parker was picking shamrocks he picked a total of 40 shamrocks two fifths of the shamrocks had four leaves. The rest of the shamrocks had three leaves.
First of all, we will find two fifths of 40 to find number of shamrocks with four leaves.
Now, we will subtract number of shamrocks with 4 leaves from total number of shamrocks to find number of shamrocks with 3 leaves as: