tolong jelaskan caranya!

(3x8+3)/8 + 1/4 + 7/10
27/8 + (1x2)/(4x2) + 7/10
27/8 + 2/8 + 7/10
(27+2)/8 + 7/10
29/8 + 7/10
(29x10)/(8x10) + (7x8)/(10x8)
290/80 + 56/80
(290+56)/80
246/80
3 6/80

27 per 8 + 1 per 4 + 7 per 10 = cari KPK terus di tambah semua ya