Im in a hurry what is the value of the expression? 5(9/12−1/4)+0.5 enter your answer, in simplest form, in the box. me

5(9/12-1/4)+0.5

5(9/12-1/4)+5/10

5(3^2 over 2^2*3- 1 over 2^2)+ 5/2*5

your answer is 3 

5(9/12-1/4)+0.5
simply start by making the fractions equal, 1/4 is the same as 3/12
5(9/12-3/12)+0.5
subtract the fractions
5(6/12)+0.5
simplify the fraction
5(1/2)+0.5
multiply
2.5+0.5
add
3 is your answer