Fatty acids may be converted to acetyl coa through a process called dehydrogenation gluconeogenesis beta oxidation ketogenesis transamination

Fatty acid converted to acetyl coa through a process called  BETA OXIDATION.
{   beta oxidation is a process in which fatty acid molecules broken down to produce energy }  specially it is used to convert long acetyl coa chain in to short  progressively fatty acetyl coa chains . this reaction release acetyl coa , FADH2 , NADH three of which then enter other metabolic process called critic acid cycle , in which ATP is produce is used as energy