Let x be the productivity.

With three people working instead of 5, the productivity falls to

3x/5.

Presuming that the factoring can do any amount of work in a given

time (for a fixed amount of worker) and you're measuring it simply by

how much there is to do, then your 3x/5 increases to 3960x/6000 =

66x/100 = 66%. Therefore the factory suffers a 34% drop in

productivity. By my reckoning anyway.

Of course, your 1200-to-1300 thing could be a red herring, in which

case the drop is only 40%.

--- In

mathforfun@yahoogroups.com, "Michelle <mplus_2000@y...>"

<mplus_2000@y...> wrote:

> I need help thinking something through (this should be

embarrassingly

> easy for you guys, forgive my ignorance). Here is the question: If

> over the last year the amount of work to be done in a factory went

up

> by 120 units (from 1200 to 1320) but my staff went down by 2 people

> (from 5 to 3), what is the productivity increase/decrease of the

> factory).

>

> Please help me think through this one!