How to use LIKE %a% when passing a parameter in raw sql django

Question

I have a parameter search_query and I want to get all the objects that consist search_query using only raw sql(I know that Django has built-in functions for that) Here is my code:

def search(request):
    cursor = connection.cursor()
    cursor.execute("SELECT (Lastname + ' ' + Firstname + ' ' + Patronymic) as n from Person")
    data = dictfetchall(cursor)
    search_query = request.GET.get('search','')

    cursor.execute("SELECT (Lastname + ' ' + Firstname + ' ' + Patronymic) as n from Person WHERE Lastname LIKE %s",[search_query])
    data = dictfetchall(cursor)
    return render(request,'other.html',{'data':data,'search_q':search_query})

Tried to do like this WHERE Lastname LIKE %%s%, but it didn't work. Couldn't find anything in the internet((