On a test of 40 questions, Dave answered 4 correctly. On another test, Dave answered 8 correctly out of 80. Did Dave get the same portion of each text correct?
Im having trouble working this problem out can someone show me how to work this out..?
thanks
2006-11-22 02:13:34 · 5 answers · asked by BlueEyes4172004 1 in Science & Mathematics ➔ Mathematics
Ok i get it now, YOU GUYS are great, thanks so much for NOT being mean about this...
2006-11-22 02:26:33 · update #1
Ask youself "Does 4/40 = 8/80 ?"
4/40= 1/10, and
8/80 = 1/10
So the answer is Yes.
2006-11-22 02:19:29 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
First you start by determining how much percent 4 is from 40. The traditional way is: 4/40= 0.1. 0.1x100(to obtain percentage) (this is the long way around but it will always get you the correct answer). So, 4/40=0.1 0.1x100=10. So in the first test, Dave answered 10% correctly.
In the second test, he got 8 questions out of 80. Once again you do the same: 8/80 = 0.1, 0.1x100=10. So in the second test, Dave also answered 10% correctly.
I hope this helps!
For future reference: always divide the amount through the total amount and multiply by 100 to obtain percentages.
2006-11-22 10:20:22 · answer #2 · answered by Bex 3 · 0⤊ 0⤋
4/40 = 1/10 = 10/100 = 10%/100% = 10%
8/80 = 1/10 = see above
2006-11-22 10:19:53 · answer #3 · answered by Anonymous · 0⤊ 0⤋
40 divided by 4 = 10
80 divided by 8 = 10
2006-11-22 10:22:47 · answer #4 · answered by Sami V 7 · 0⤊ 0⤋
he got the same percentage of questions correct if thats what you mean.
(4*100)/40 = 10%
(8*100)/80 = 10%
2006-11-22 10:18:04 · answer #5 · answered by Anonymous · 0⤊ 1⤋