Homework Help: 5th grade fractions

Posted by Meghan on Monday, January 25, 2010 at 6:38pm.

Attendance at the Fireman's Ball has been declining. Each Year, the number attending is 2/3 of the previous year's attendance.
In what year will the attendance be less than 1/3 the original attendance?

5th grade fractions - bobpursley, Monday, January 25, 2010 at 6:53pm
(2/3)^N = 1/3

I recommend use logs
Nlog2-Nlog3=log1-log3
N(log2-log3)=0-log3
solve for N.

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