`2/3+1/6-1/12`
`=8/12+2/12-1/12`
`=(8+2-1)/12`
`=9/12=3/4`
`2/3 + 1/6 -1/12`
`= 4/6 + 1/6 -1/12`
`= 5/6 -1/12`
`= 10/12-1/12`
`=9/12`
`=3/4`
\(\dfrac{2}{3}+\dfrac{1}{6}-\dfrac{1}{12}=\dfrac{8}{12}+\dfrac{2}{12}-\dfrac{1}{12}=\dfrac{8+2-1}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)