anonymous
  • anonymous
how do i do this problem 7/20 =decimal number?
Mathematics
katieb
  • katieb
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pfenn1
  • pfenn1
what is \[\frac{7}{20}=7\div20=?\]
pfenn1
  • pfenn1
Or you could multiply the fraction by 5/5.\[\frac{7}{20} \times \frac55=\frac{35}{100}\]
anonymous
  • anonymous
2.86 how did you get the 5/5

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anonymous
  • anonymous
What are you trying to do? Or what does the question ask?
pfenn1
  • pfenn1
I was multiplying the expression by 1. I chose 5/5 because I wanted the denominator to be 100. Because we know what the decimal of 35/100 is......0.35.
anonymous
  • anonymous
thanks i was divivding backwards , i havent had math in twenty years studing for placement test
pfenn1
  • pfenn1
Good luck with that. I know how you feel. I haven't taken math in almost 30 years.
anonymous
  • anonymous
that is the answer 0.35
anonymous
  • anonymous
how about this? all of the following are ways to right 25 percent of N except 0.25 N ,25n/100, 1/4 N ,25 N
pfenn1
  • pfenn1
Which one do you think?
anonymous
  • anonymous
25N?
pfenn1
  • pfenn1
Yep. That one shows 25 times N. The others are all equal to one another.\[0.25 N = \frac{25N}{100}=\frac 14N\]
anonymous
  • anonymous
thanks thats pretty good if you havent had math in 30 yrs!!!!
pfenn1
  • pfenn1
You're welcome.

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