Posted by Meghan on .
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,
(2/3)^N = 1/3
I recommend use logs
Nlog2Nlog3=log1log3
N(log2log3)=0log3
solve for N.