I know this might sound tacky, but I would say use long division. It's fast and easy. I think your first reply was hinting at it, because the method is similar. Just add 0's.

for example:

....._0.091_

16.4)1.50

........148

......------

...........20

...........16

..........----

............40etc, etc

Ok, so first I just write it out, then when you get good at it you can do it in your head.

_________

denominator) Numerator

Then place the decimal point directly above where it is listed under the "bracket."

ask yourself, does 16.4 go into 1 - no (add a 0 above the line at that point)

15 - no (add a 0)

150 - Yes

When it's a big number like this I use multiples of ten - so I would get 164 [too much, so drop one 16.4 so it goes into 150 9x = ~148]

write the 148 below the line. Then the 9 above it.

Now subtract 148 from 150 = 2

Then ask yourself does 16.4 go into 2? No so add a 0

does 16.4 go into 20? Yes 1 time (put the 1 above the line).

You can keep doing it to get as accurate as you want. For the mcat you can usually get away with 1 or sig figs.

It looks like a lot, but it is sooo easy and ensures that you don't mess up an easy calculation. Once you get it down you can knock out what would look like a pretty hairy piece of division in ~10 seconds or less.