My tutor used to say:
'When converting from
simple to compund time, we ...
ADD dots (to whole beats) and ...
DROP the triplets (if there are any).
When converting from
compound to simple its the reverse...
DROP the dots (from whole beats) and...
ADD triplets (to groups of 3 notes beamed into beats).'
Evrything else should stay the same... I hope
Hope this helps
denmark77