a case of 12 rolls of paper towels sells for $ 9 . the cost of one roll sold individually is $ 1 . what is the percent w of savings per roll for the 12 - roll package over the cost of 12 rolls purchased individually ?
n0 = 12.0
n1 = 9.0
n2 = 1.0
n3 = 12.0
n4 = 12.0
t0 = n1 / n0
t1 = t0 * 100.0
answer = 100.0 - t1
print(answer)