PERCENT INCREASE AND DECREASE COMMON CORE ALGEBRA I HOMEWORK
FLUENCY
1. Perform cach of the following calculations using a single multiplication. Show the product that you use to
find your final answer. Do not round your final answers.
(a) Increase 350 by 5% (6) Increase 120 by 10% (e) Increase 34 by 2%
(d) Increase $450 by 3.5%
(e) Increase $1,300 by 64%
(1) Increase 2,698 by 24%
2. Perform each of the following cakculations using a single multiplication. Show the product that you use to
find your final answer. Do not round your final answers.
(a) Decrease 160 by 10% (b) Decrease 450 by 6% (c) Decrease 122,000 by 12%
(d) Decrease $1.820 by 3%
(e) Decrease $12,500 by 15%
(Decrease $4.50 by 8%
APPLICATIONS
3. A population of bacteria is growing at a rate of 20% per hour. If the population starts at 320, what is it an
hour later?
(1) 360
(3) 372
(2) 356
4. The price of oil, in dollars per barrel, declined last week by 3.9%. If it started the week at $102,00 per
barrel, at what per barrel price did it end the week!
(1) 598.43
(3) 599.12
(2) S98.50
(4) $100.56