translate English to French: About 80% (55.3 ± 2.5 kJ) of the total energy in the egg (60.7 ± 3.8 kJ) was contained in the yolk.
Environ 80% (55,3 ± 2,5 kJ) de toute l'énergie de l'œuf (60,7 ± 3,8 kJ) est contenue dans le vitellus.