12(3/4+1/12+5/24) = 12(9/12 + 1/12 + 5/24) = 12*(15/12) = 15
25/46(18/25 + 1/5) = (25/46)(45/50 + 10/50) = (25/46)*(55/50) = 275/92
12(3/4+1/12+5/24) = 12(9/12 + 1/12 + 5/24) = 12*(15/12) = 15
25/46(18/25 + 1/5) = (25/46)(45/50 + 10/50) = (25/46)*(55/50) = 275/92