Discussion in 'Tips, Tutorials & Tools' started by Fishcarver, Jul 24, 2004.

1. ### FishcarverActive Member

Joined:
Jul 20, 2004
Messages:
890
1
The formula for ENLARGING is

E= L / S, where L is the larger scale, and S is the smaller, and E is the percentage enlargement.

The formula for REDUCING is

R= S / L, where R is the percentage reduction.

Decimal equivalents of common scales:

1: 87 = 0.0115
1:72 = 0.0139
1:50 = 0.0200
1:48 = 0.0208
1:33 = 0.0303

Therefore, for example, to REDUCE 1:33 to 1:72 = 0.0139 / 0.0303 = 0.4587 = 46%

Fishcarver
2. ### RyanShort1Member

Joined:
Feb 4, 2004
Messages:
398
1
You don't even need to reduce those to decimal equivalents.
All you need to do is divide the lower part of the scale by the lower part of the other scale.
Just use the calculator function on your computer and try this:

33/72=.458333333... equals 45.8%
72/33=2.1818181... equals 218.18%

Ryan
3. ### FishcarverActive Member

Joined:
Jul 20, 2004
Messages:
890
1

Ryan: You and Math gotta be better friends than it and I is,,,,
JR

Joined:
Jul 19, 2004
Messages:
72
0
5. ### shoki2000Active Member

Joined:
Feb 7, 2004
Messages:
990
0
C=Pi x D

where
C - cirumference
Pi - 3.14159265358979323846...
D - diameter

so
D=C/Pi
6. ### kk135Member

Joined:
Jul 19, 2004
Messages:
72
0

Too many years out of school. THANKS.
7. ### shoki2000Active Member

Joined:
Feb 7, 2004
Messages:
990
0
Having school-age kids is a big incentive to remember those obscure formulas
8. ### kk135Member

Joined:
Jul 19, 2004
Messages:
72
0
Oh great!! :twisted:
Being in my mid-40s with a 2 year old, I'll probably be dead before I get to see these again. Thank goodness I have you guys to get my math formulas for me. hehehe :lol:

Joined:
Sep 4, 2004
Messages:
28