12:4•7+19:8•9+18:7=?

Question

12:4•7+19:8•9+18:7=?

Answer 1

=21+21.375+2.57=приблизно 45

Answer 2

12:4×7+19:8×9+18:7 = 21 + 171/8 + 18/7 = 21 + 21 3/8 + 2 4/7 = 44 + 21/56 + 32/56 = 44 53/56