(-25) × [6 + 4] is not same as​

Here in this case the answer is "a". The way to find the percentage is to add all the numbers you have which is $49. And then you need to use it to divide it with the percentage you need for the number. Which in this case you are searching for shoelaces and it $4. So you divide the cose of the shoelaces $4  to the total amount $49. And then you multiply by 100 to get the percentage. If you round it off the the tenth place you should get 8.2%