If you're working out a percentage, you should equate the problem out of 100. Luckily for you, this question has a total of 100 anyway, so there's not much to do.
If you've done 51/100, you've done 51%, because 51 out of 100 is already out of 100, so you don't need to change any numbers.
If you have 49 left, then you still need to complete 49%. Once again, 49 out of 100 is already of 100, so it's literally just 49%.
