Respuesta :

(1/4+5/8)*2/3       1/4=2/8        
2/8+5/8=7/8    7/8*2/3      7/8=21/24       2/3= 16/24

21   16    336
--- x --- = ------ Probably able to reduce here. 
24   24    576
1/4 = 2/8
2/8 + 5/8 = 7/8 x 2/3
= 14/24 (7/12)