Question 1064060
<pre>
            JOB       TIME (minutes)

Huey         1        12

Dewey        1        18

Louie        1        30
</pre>


Compare  rates for job per minute:
{{{system(1/12,1/18,1/30)}}}


LCD is 180.

{{{system(15/180,10/180,6/180)}}}


Since that is based on all the same denominator of 180 minutes, the numerators show the relative amount of jobs.  Use just the numerators to get the fraction of the "weeding Donald's garden" job that the three boys did.


They together did 1 whole job.

{{{15+10+6=31}}}


Huey:  {{{15/31}}} of the job
Dewey:  {{{10/31}}} of the job
Louie:  {{{6/31}}} of the job