Say a test had 175 questions and you missed 20. How would you figure the percent you got right or wrong? It's been over 20 years since I was in school & I forgot how. Don't you divide 175 by 20?
2007-11-05 07:02:08 · 32 answers · asked by ♥bigmamma♥ 6 in Science & Mathematics ➔ Mathematics
Thanks to you all! I remember now! I had the wrong percent backwards & for the life of me couldn't figure out the right percent!
2007-11-05 07:12:53 · update #1
DIVIDE THE AMOUNT YOU GOT RIGHT BY THE TOTAL AMOUNT. THEN MULTIPLY BY 100.
155 RIGHT/175 TOTAL=.885714
MOVE DECIMAL OVER 2 PLACES TO THE RIGHT
88.57%
2007-11-05 07:04:46 · answer #1 · answered by Anonymous · 1⤊ 0⤋
A 'percent' is another way of saying 'a hundredth'.
For example, since 1/2 = 50/100, we say that one half is fifty percent.
How many did you miss? 20 out of 175. What fraction is that? 20/175.
Can we express this fraction in hundredths? Yes but the numerator may be a fractional number.
20/175 = 0.1142857...
which you could rewrite as
11.42857/100
which could be expressed as 11.32857%
Normally, we don't use that many decimals, so you could say 11.4%.
How many did you get right? If we assume that you tried them all, then either we do the same calculation with (175-20)/175
or we realise that 175 represents 100% (the entire thing) and we take
100% - 11.4% leaving 88.6%
You didn't sound too dumb, as your question was expressed clearly.
2007-11-05 07:10:33 · answer #2 · answered by Raymond 7 · 1⤊ 0⤋
Divide 20 by 175, multiply by 100
2007-11-05 07:05:03 · answer #3 · answered by ima_super_geek 4 · 0⤊ 0⤋
You subtract 20 from 175 and then you divide that answer from 175, so 175-20=155/175=about89%
2007-11-05 07:05:52 · answer #4 · answered by Daniela 2 · 0⤊ 0⤋
You take 155 (175 total minus the 20 you missed) and divide that by 175 to get the percentage (around 88%)
2007-11-05 07:04:46 · answer #5 · answered by Anonymous · 0⤊ 0⤋
100% is the whole thing. Therefore 175 questions = 100%.
If you missed 20 your score is 175 -20 = 155.
The decimal equivalent is 155/175 = .8857142857. Move decimal two places to the right and get 88.6 % rounded to one place. Think of 1 dollar as 100% Not all conversions from fractions to decimals come out even. Such as your % score. 20/175 = .114 or 11.4% wrong
2007-11-05 07:14:21 · answer #6 · answered by gzlakewood@sbcglobal.net 4 · 0⤊ 0⤋
Percent right:
you got 155 right out of 175. divide
155/175 = 89%
Percent wrong:
you got 20 wrong out of 175. divide
20/175 = 11%
Percent = amount/ total
2007-11-05 07:13:13 · answer #7 · answered by ? 2 · 0⤊ 0⤋
you missed 20 of 175, so divide 20/175 then multiply by 100 to get the % missed
2007-11-05 07:05:02 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Just subtract the total # wrong from the # of questions and divide that by the total number of questions, then mult by 100 to get your percent:
(175-20)/175 * 100% = 88.6 %
2007-11-05 07:06:08 · answer #9 · answered by Anonymous · 0⤊ 0⤋
divide 20 by 175 and multiply by 100
2007-11-05 07:05:40 · answer #10 · answered by pete1ny 2 · 0⤊ 0⤋
Subtract 20 from 175. Then divide 155 by 175. You'll get a decimal to make it a percent move decimal two places to right and you'll have your pecent
2007-11-05 07:18:05 · answer #11 · answered by Anonymous · 0⤊ 0⤋