SOLUTION: In a class of 30 students,50% went to library. how many students went to library?(15). At the sme time 10 of the students helped with the canned food drive. What fractional part o

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: In a class of 30 students,50% went to library. how many students went to library?(15). At the sme time 10 of the students helped with the canned food drive. What fractional part o      Log On


   

Question 180705: In a class of 30 students,50% went to library. how many students went to library?(15). At the sme time 10 of the students helped with the canned food drive. What fractional part of the class is that? What Percentage is that?
THe rest of the students stayed in the classroom to finish their homework. What fraction of students stayed in the classroom?.(1/6) What percent is that? I can't figure the percentages. Can you show me how you got the answer also. I put some of my answers in parentheses. Thank you for your help
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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In a class of 30 students,50% went to library. how many students went to library?(15). At the same time 10 of the students helped with the canned food drive. What fractional part of the class is that? What Percentage is that?
THe rest of the students stayed in the classroom to finish their homework. What fraction of students stayed in the classroom?.(1/6) What percent is that? I can't figure the percentages. Can you show me how you got the answer also. I put some of my answers in parentheses. Thank you for your help
:
To convert a fraction to percent:
Divide the numerator by the denominator and multiply by 100
:
To convert per cent to a fraction:
Write the per cent over 100 and reduce the fraction
:
In this problem:
"In a class of 30 students,50% went to library. how many students went to library?(15)."
50%2F100 = 1%2F2; 1%2F2 * 30 = 15, like you said
on a calc: enter 50/100 * 30 = 15
;
" At the same time 10 of the students helped with the canned food drive."
What fractional part of the class is that?
10%2F30 reduces to 1%2F3
What Percentage is that?
1 divided by 3 times 100; 1%2F3 * 100 = 33.33%
:
"The rest of the students stayed in the classroom to finish their homework." What fraction of students stayed in the classroom?.(1/6)
30%2F30 - 1%2F2 - 1%2F3
Common denominator
30%2F30 - 15%2F30 - 10%2F30 = 5%2F30 = 1%2F6, like you got
What percent is that?
on a calc: enter: (1/6) * 100 = 16.67%