Dropdown content aligned left

Hi, I’m trying to get the contents of a dropdown aligned to the left. In the image below the left is current behaviour, right is what I’m looking for.

Generally the internet suggests that using the css works on HTML dropdowns

.dropdown-content {
    right: 0;
}

assigning right: 0 to the dropdown className that I want to alter doesn’t work, though changing width does. Any ideas?