Each piece must be 1/12 of the whole. They must add up to 9/8 of a meter.
(9/8 m) * (1/12) = 9 / 96 m long. But this reduces.
3 / 32 m long is lowest form of the answer
Check
If you multiply 3/32 by 12, you should get back to 9/8
3/32 * 12 = 36/32 = 9/8 which is what we tried to do.