4. Use mental math to find the following.
a) 20% of 60
b) 250% of 400
c) 10 1/2% of 100
5. Determine the percent of each number.
Give your answer to the nearest
a) 2/5% of 325
b) 15 1/4% of 950
c) 175% of $125.50
* another way to find the percent of a number is dividing the percent by 100 then multiply the answer with the number*
7. Two hundred tickets are being sold for a
a) What is your chance of winning with
one ticket? Express your answer as
b) How many tickets would you need
to purchase to have a 2.5% chance