Short thing

deleted = 0
allLength = sum(1 for line in open('C:/Users/Nathan/PycharmProjects/untitled/Wiki Input.txt'))
with open('C:/Users/Nathan/PycharmProjects/untitled/Wiki Input.txt', 'r') as fileContents:
    for i, line in enumerate(fileContents, 1):
        if "--" in line:
            deleted += 1
        if "* LATER" in line:
            allLength = i
print(str(round((100.0 / float(allLength)) * deleted)) + "% complete pre-mission, " + str(round((100.0 / float(sum(1 for line in open('C:/Users/Nathan/PycharmProjects/untitled/Wiki Input.txt'))) * deleted))) + "% complete total")