you take your price then add the sales tax with it
total = 98.79
see its vary simple its just a matter of finding the total of your sales tax and adding it to the original price . hopes this simplified version help have a good day =)
A simple trick is to look at the numerator and denominator separately, if they're both perfect squares then you're good (4, 2^2, check. 9, 3^2, check.)
To find the answer start by plugging in numbers. first, subtract the number from 100 or Jessa's number of cookies then multiply that by 2 and subtract that from 120 or Cooper's cookies. If the two resulting numbers are equal then you have the right answer.