Sheet # 199/Percentage
Name: ________________________ Date_____________
Explain and Show Your Work.
1) 69% of the voters approved the tax. How many of the 3,593 voters did not support the tax?
2) A new lawn mower costs $297.00. If there is a 20% off sale, how much will the lawn mower cost?
3) An alloy contains 10.5 % zinc by mass. If a sample contains 0.45 grams of zinc, what is the total mass of the sample?
4) The sportswriter has been right 63% of the time on his predictions of the NFL winners each week. If there are 20 games each week,
how many does he predict incorrectly? Round your answer to the nearest whole number.
5) The library has 87,035 books. 43% of them were purchased before 1980. How many have been bought from 1980 to the present? Round the answer to nearest whole number.
Answers to Sheet #199
1) 1.00 - .69 = .31
.31 * 3593 = 1113.83 ~ 1114
2) $297.00 - (.20 * $297.00) = $237.60
3) (0.45g of zinc/total mass) = (10.5/100)
total mass = 4.299 grams
4. 1.00 - .63 = .37
.37 * 20 = 7.4 ~ 7 games predicted incorrectly
5. 1.00 - .43 = .57
.57 * 87,035 = 49609.95 ~ 49,610 books