How do I calculate this question? find the position of the centre of gravity in % Find the position of the centre of gravity in % of the MAC (mean aerodynamic chord) if the distance from the datum to the LEMC (leading edge of mean chord) is 13 meters, the distance to the TEMC (terminal edge of mean chord) is 19 meters and the distance from the datum to the centre of gravity is 15 meters?
I believe that the Length of the Aerodynamic Chord is $19\ m - 13\ m = 6\ m$, and that the CG is $2 m$ from the Leading Edge of the Mean Chord (LEMC).

Therefore, I believe that the CG in percent is:
$$
\mathrm{\frac{CG}{Length\ of\ Chord}} = \frac{CG - LEMC}{TEMC - LEMC} = \frac{15-13}{19-13} = \frac{2}{6} = 33\%
$$