# math

posted by .

janet spent 1/3 of study time on one subject and 2/7 on another subject. what fraction of her study time remains?

• math -

We first need to find the common denominator.

1/3 = 7/21
2/7 = 6/21

7/21 + 6/21 = 13/21

21/21 - 13/21 = 8/21 remaining time

## Similar Questions

1. ### math

please check and see if my answers are correct if not let me know so i can redo these and find where i messed up 1. divid by moving the decimal point 27.3 dived 10^5 my answer .000273 2.Jon spent 1/3 of his study time doing math homework …
2. ### math

the least common multiple of 3, 6,9 i say 18 Sheila practiced hours Monday, hours Tuesday, and hours Wednesday. What is the total number of hours that she practiced?
3. ### math

jon spent 1/2 of his study time doing math homework and 2/7 proparing for a history exam. Waht fraction of his study time remains?
4. ### math

Jon spent 1/3 of his study time doing math homework and 2/7 preparing fo a history exam what fraction of study time remains?
5. ### math

please check my answers 1.which is smallest 5/8,3/4,9/16,7/8 =9/16 2.subtract 6 3/10-4 11/15=1 17/30 3.estimate 6 1/8* 7 4/5=48 4.lcm of 20,32=160 jon spent 1/3 of his study time doing math and 2/7 preparing for history exam. what …
6. ### math115

which numbers are prime numbers 37,39,41,43 answer 37,41,43 John spent 1/3 of his study time doing math homework and 3/5 preparing for a history exam what fraction of his study time remains?
7. ### social studies

I have a social exam coming up, and my teacher told us the stuff we need to study. One thing she told us to study was the Industrial Revolution in Britain. There is a whole chapter on that so do you think I need to go deep into it …
8. ### economic

10. Suppose, unfortunately , your mathematics and economics professors have decide to give tests 2 day from now and you can spend only a total of 12 hours studying for exams .After some thought, you conclude that dividend your study …
9. ### economic

Suppose, unfortunately , your mathematics and economics professors have decide to give tests 2 day from now and you can spend only a total of 12 hours studying for exams .After some thought, you conclude that dividend your study time …
10. ### Math

Out of 40 student in a class 16 study English ,22study account & 26 eco. 5 study English & eco ,14 Account & eco 2 study all the three subject if each student studies at least one of the three subject. Find the number of student who …

More Similar Questions