Two-way tables: counts and percents

Answer Key - Grade 8 Math Worksheet

Circle the best answer, or write your answer on the line.

1. Read this first

   Two-way table of students

   	Does a sport	No sport	Total
   Plays an instrument	21	9	30
   Does not play	12	18	30
   Total	33	27	60

2. 1.

   Tala's table shows students. Of the students who play an instrument, what percent do a sport, to the nearest whole percent?

   70

3. Two-way table of club members

   	Likes hiking	Does not like hiking	Total
   Has a pet	12	18	30
   No pet	21	24	45
   Total	33	42	75

4. 2.

   Zee's table shows club members. Of the club members who have a pet, what percent like hiking, to the nearest whole percent?

   40

5. Two-way table of students

   	Milk	Water	Total
   Brings lunch	27	18	45
   Buys lunch	10	25	35
   Total	37	43	80

6. 3.

   Ari's table shows students. Of the students who bring lunch, what percent drink milk, to the nearest whole percent?

   60

7. Two-way table of visitors

   	Stayed	Left early	Total
   Flew a kite	28	7	35
   Did not fly one	15	25	40
   Total	43	32	75

8. 4.

   Bo's table shows visitors. Of the visitors who flew a kite, what percent stayed for the picnic, to the nearest whole percent?

   80

9. Two-way table of readers

   	Likes drawing	Does not like drawing	Total
   Reads comics	18	22	40
   Does not read comics	12	26	38
   Total	30	48	78

10. 5.

    Esme's table shows readers. Of the readers who like drawing, what percent read comics, to the nearest whole percent?

    60

11. Two-way table of students

    	Entered the fair	Did not enter	Total
    Science club	14	6	20
    Not in the club	21	36	57
    Total	35	42	77

12. 6.

    Jun's table shows students. Of the students who entered the science fair, what percent are in the science club, to the nearest whole percent?

    40
13. 7.

    Kira's table shows students. Of the students who play the piano, what percent sing in the choir, to the nearest whole percent?

    64
14. 8.

    Milo found the row percents in a table of students. Is there a link between whether students checked the weather report and whether they brought an umbrella?

    • Yes: students who did not check it tend to bring an umbrella more often than students who checked the weather report.
    • No: about the same share of each group of students tends to bring an umbrella.
    • Yes: students brought an umbrella because they checked the weather report.
    • Yes: students who checked the weather report tend to bring an umbrella more often than students who did not check it.
15. 9.

    Noah found the row percents in a table of students. Is there a link between whether students bike to school and whether they eat breakfast at school?

    • No: about the same share of each group of students tends to eat breakfast at school.
    • Yes: students eat breakfast at school because they bike to school.
    • Yes: students who do not bike to school tend to eat breakfast at school more often than students who bike to school.
    • Yes: students who bike to school tend to eat breakfast at school more often than students who do not bike to school.

16. Use this

    Row percents. Of the students who are in Grade 7: 52% prefer morning recess. Of the students who are in Grade 8: 55% prefer morning recess.

17. 10.

    Ren found the row percents in a table of students. Is there a link between whether students are in Grade 7 and whether they prefer morning recess?

    • Yes: students who are in Grade 7 tend to prefer morning recess more often than students who are in Grade 8.
    • Yes: students prefer morning recess because they are in Grade 7.
    • Yes: students who are in Grade 8 tend to prefer morning recess more often than students who are in Grade 7.
    • No: about the same share of each group of students tends to prefer morning recess.