Question

One half plus three fourths

Answer 1

1.25 because 1/2 plus 3/4 =1.2 + 3.4 add 4.60 divide by a variable like n or t.
That's how I learned it sorry if was no help.

Answer 2

One half equals 2 fourths so one half plus 3 fourths equals five fourths or 1 and 1/4