Math

1. The towns population increased from 80,000 to 90,000 in ten years. What was the percent of increase? I didn't understand this one.
2. A $15 item on sale for $12 is marked down what percent? 20%
3. If Jenna buys and item for 40% off the regular price, will she pay more or less than half the price? Less than
4. If Jenna saves $20 buying an item for 40% off the regular price, then what were the regular price and the sales price? Regular price is $50 and sales price is $30
This is what I got. Can someone please check this and if it's wrong please tell me my mistake and how to fix it. The answer will be helpful to make sure I get it right but please put in how to actually fix it. I really didn't understand this lesson

  1. 👍 0
  2. 👎 0
  3. 👁 102
asked by Anon
  1. 1.
    90,000 - 80,000 = 10,000
    100(10,000 / 80,000) = 12.5% increase

    2. Yes

    3. No

    4. Yes

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra - please check my answer for me

    The population increased 80 percent in 5 years. The current population is 18,000. find five years ago. 18,000 * 0.80 = 14,400 18,000 - 14,400 = 3,600 3,600 is the population five years ago? to check: 3,600 * 5 = 18,000 Is 3,600

    asked by Terence P. on September 3, 2007
  2. Math

    What is the percent increase in the population for all six inhabited continents from 1950 - 2000? 1950 2000 N.America 221,000,000 305,000,000 S.America 111,000,000 515,000,000 Europe 392,000,000 510,000,000 Africa 229,000,000

    asked by Anonymous on August 28, 2009
  3. business math

    If Naomi decides that she will invest $3,000 per year in a 6% annuity for the first ten years, $6,000 for the next ten years, and $9,000 for the next ten years, how much will she accumulate? Treat each ten year period as a

    asked by Heather on April 5, 2010
  4. math

    I want to check my answers 1. The town population increased from 80,000 to 90,000 in ten years. What was The percent of increase? 2. A $15 item on sale for $12 is marked down what percent 3. If Jenna buys an item for 40% off the

    asked by Anon on April 27, 2015
  5. Math

    What was the percent increase in the population in South America from 1900 to 2000? in 1900- 38,000,000 in 2000- 515,000,000 I was thinking that I need to divide 515,000,000 by 38,000,000 which is 13.55% but I am not sure.

    asked by Maggie on June 7, 2007
  6. Math

    The population of a city has been decreasing exponentially since 1990. In 1990, the population was 1,000,000. In 2010, the population was 560,000. If t represents time in years since 1990, which of the following equations best

    asked by Rayhan on February 6, 2017
  7. Freshman Algebra 1 Honors

    This is Growth and Decay 1. The U.S. populace increases at 0.91% per year. If the population in 2008 was 303,146,000 , what will it be in 2017? 2. A mechanist bought materials for about $125,000. He wants to calculate it's value

    asked by GIOVANNI on December 6, 2017
  8. business math

    The GDP of Company E was $500 million in 1995. The population was 1 million, so the average income was $500. As a result of economic growth, GDP in 2005 was $1,500 million. The population was already 2 million. What was the

    asked by Peppermintmocha on January 14, 2011
  9. MAT115

    if the electricity bill increased from $10,000 to $13,000 in a year, to the nearest whole percent, what was the rate of increase? I need to see how to work this one. I divided 3,000 by 10,000 and got.3 What is that in percent and

    asked by barb on July 20, 2010
  10. math 115

    I have a world population of 1591000000 in 1950 and a population of 4028000000 in 2000. I need to know the percent of increase. First I subtract 1591 from 4028= 2,437,000,000 and then I divide that by 1,591,000,000, which equals

    asked by Lost on July 17, 2009

More Similar Questions