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Vito Prosciutto: Teaching community college math on the road to a PhD.

Wednesday, March 03, 2004

20:42
Algebra - percentages 

Algebra class went relatively smoothly. There was some confusion on how to set up proportions in the applications, so I went over those homework questions again, but there didn't seem to be anywhere near enough problems in the book to provide additional practice.

With percentages, the problems all follow a set formula:

A is P percent of B
which translates to the equation
A=P/100*B
So if we have, for example,
12 is what percent of 48?
We can write that as:
12=P/100*48
and solve for P.

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