11: answer is $18
This is because $30 divided by 100 = $0.30, times that by 120 to get the total with 20% tip which = $36
$36 divided by 2 = $18
12: answer is 88 people
220 divided by 100 is 2.2
2.2 times 60 is 132 people for changing the mascot.
so to find how many were against, you do 220-132 = 88 people
