12:7
because you add 7 and 5 and then there is the 7 for the book weight
I think 1/4 is the answer
what's up? to convert this into a fraction, simply multiply 12.3/1 by 10 in order to get 123/10. you can also do it by seeing .3 is in tenths, so it would be 3/10. you are left with 12 (whole number) so 12 3/10 which is also 123/10
best of luck with your studies
