2-11. PROCEDURE FOR FINDING PROPORTIONS
a.
Draw a problem matrix
b. Insert quantities as shown.
c.
Subtract along the diagonals.
d. Read along the horizontals.
NOTE: The desired strength always goes in the center square of the matrix. The
desired strength is the strength of the preparation that you want to make.
MAKE is the key word in deciding the desired strength. Usually, the strength
on the prescription will be the desired strength.
MD0802
2-32
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