Cirrus SR22 Pilot Operating Handbook page 165

Cirrus Design Section 6
SR22 Weight & Balance
The above procedure determines the airplane Basic Empty Weight,
moment, and center of gravity in inches aft of datum. C.G. can also be
expressed in terms of its location as a percentage of the airplane
Mean Aerodynamic Cord (MAC) using the following formula:
C.G. % MAC = 100 x (C.G. Inches – LEMAC) / MAC
Where:
LEMAC = 133.1
MAC = 47.7
P/N 13772-001 6-9
Revision A8