def calculate_overlap(word_token1: list, word_token2: list) -> float:
    """ Get similarity percentage from usage of similar words in two strings """

    overlapping_words = []

    for word in word_token1:
        if word in word_token2:
            overlapping_words.append(word)

    overlap_percentage = len(overlapping_words) / len(word_token1) * 100

    return round(overlap_percentage, 3)