Results 1 to 6 of 6

Math Help - Theme = percentage

  1. #1
    Member Sazza's Avatar
    Joined
    Apr 2007
    From
    Australia
    Posts
    98

    Arrow Theme = percentage

    Hey, i'm doing some stuff on percentage, and i'd just like to clarify somethings, if that's okay???:
    I have to find the simple interest on: $620 at 8.5% p.a. for 2 years. I have so far as workings is concerned: i = p*r*t/100
    = 620 * 8.5 * 24/100
    i can't figure out weather i multiply the rate by the time or divide it!
    also: i don't have a clue how to do this, i'm not really that good at these: $3500 at 9% p.a. for 3 years, 9 months.

    and also to clarify one more thing: Steve received an extra $36.75 in his pay packet after receiving a pay rise of 71/2%
    calculate:
    a) Steve's wage before his pay rise: (my workings so far) 7.5 divided by 100 (relating %, you know how the % can be a 100) * 36.75 = 2.76
    b) steve's wage now--???

    Thanks,
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    Quote Originally Posted by Sazza View Post
    Hey, i'm doing some stuff on percentage, and i'd just like to clarify somethings, if that's okay???:
    I have to find the simple interest on: $620 at 8.5% p.a. for 2 years. I have so far as workings is concerned: i = p*r*t/100
    = 620 * 8.5 * 24/100
    i can't figure out weather i multiply the rate by the time or divide it!
    Why puting t=24?
    Simply multiply 8.5%*2=17%.
    That is 620*8.5*2/100=105.4
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    Quote Originally Posted by Sazza View Post
    also: i don't have a clue how to do this, i'm not really that good at these: $3500 at 9% p.a. for 3 years, 9 months.
    First you should calculate how much percentage is for one single month.
    That is 9% / 12=0.75%.
    So we can now transform 3 years and 9 months into all months which is 3*12+9=45 months totally.

    Now simply do as last problem.
    3500*0.75*45/100=$1181.25
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member Sazza's Avatar
    Joined
    Apr 2007
    From
    Australia
    Posts
    98
    Quote Originally Posted by OReilly View Post
    Now simply do as last problem.
    3500*0.75*45/100=$1181.25



    do you mean for the same question as you just finished explaining or for the "steve received an extra....." question???
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member
    earboth's Avatar
    Joined
    Jan 2006
    From
    Germany
    Posts
    5,830
    Thanks
    123
    Quote Originally Posted by Sazza View Post
    ...
    and also to clarify one more thing: Steve received an extra $36.75 in his pay packet after receiving a pay rise of 71/2%
    calculate:
    a) Steve's wage before his pay rise: (my workings so far) 7.5 divided by 100 (relating %, you know how the % can be a 100) * 36.75 = 2.76
    b) steve's wage now--???
    Hello,

    to a):

    You know that 7.5% are the same as $36.75. Calculate the money related to 1%:
    $36.75 / 7.5% = $4.9 per percent.

    He has received a 100% pay. Thus he got $4.9 * 100 = $490

    to b):
    He now get an additional pay of $36.75. Therefore his pay is now: $490 + $36.75 = $526.75
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Sep 2007
    Posts
    12
    Quote Originally Posted by Sazza View Post
    Hey, i'm doing some stuff on percentage, and i'd just like to clarify somethings, if that's okay???:
    I have to find the simple interest on: $620 at 8.5% p.a. for 2 years. I have so far as workings is concerned: i = p*r*t/100
    = 620 * 8.5 * 24/100
    i can't figure out weather i multiply the rate by the time or divide it!
    also: i don't have a clue how to do this, i'm not really that good at these: $3500 at 9% p.a. for 3 years, 9 months.

    and also to clarify one more thing: Steve received an extra $36.75 in his pay packet after receiving a pay rise of 71/2%
    calculate:
    a) Steve's wage before his pay rise: (my workings so far) 7.5 divided by 100 (relating %, you know how the % can be a 100) * 36.75 = 2.76
    b) steve's wage now--???

    Thanks,
    yes.yours is correct.620*85*24/100*10=31*17*24/10=527*245/10=12648/10=1264.8$ is the answer.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: August 26th 2011, 10:19 PM
  2. Replies: 1
    Last Post: May 9th 2010, 07:32 PM
  3. percentage
    Posted in the Algebra Forum
    Replies: 3
    Last Post: November 18th 2008, 08:22 AM
  4. percentage
    Posted in the Algebra Forum
    Replies: 3
    Last Post: November 18th 2008, 08:02 AM
  5. percentage
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: June 10th 2008, 02:34 PM

Search Tags


/mathhelpforum @mathhelpforum