I think the problem here is that you are using inline math mode `$..$`

as opposed to display mode `\[...\]`

. Here is the comparison of the output between the two:

with the second one producing better spacing. To obtain that you need to either use one of the following

```
\[\frac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}\]
$\displaystyle \frac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}$
$\dfrac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}$
```

Note that `\dfrac`

requires that the `amsmath`

package be loaded, either by including it explictly `\usepackage{amsmath}`

, or as part some other package that already includes `amsmath`

, such `\usepackage{mathtools}`

.

Here is the MWE. Note that the `center`

environment was only used to simplify the image capture.

```
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{center}
$\frac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}$
\end{center}
\[\frac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}\]
\begin{center}
$\displaystyle \frac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}$
\end{center}
\begin{center}
$\dfrac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}$
\end{center}
\end{document}
```

To make the bar wider you can use `\overline`

as in:

```
$\dfrac{\overline{p}_1}{\overline{p}_1 + \overline{h}_1}$
```

or adapt the `xoverline`

from The \bar and \overline commands with which you can adjust the spacing:

```
$\dfrac{\xoverline{p}_1}{\xoverline{p}_1 + \xoverline{h}_1}$
```

or specify you want it wider with:

```
$\dfrac{\xoverline[1.25]{p}_1}{\xoverline[1.25]{p}_1 + \xoverline[1.25]{h}_1}$
```

Here is a comparison between `\bar{p}_1`

, `\overline{p}_1`

, `\xoverline[1.25]{p}_1}`

, and `{\xoverline[1.50]{p}_1`

```
\documentclass{article}
\usepackage{amsmath}
\makeatletter
\newsavebox\myboxA
\newsavebox\myboxB
\newlength\mylenA
\newcommand*\xoverline[2][1.00]{%
\sbox{\myboxA}{$\m@th#2$}%
\setbox\myboxB\null% Phantom box
\ht\myboxB=\ht\myboxA%
\dp\myboxB=\dp\myboxA%
\wd\myboxB=#1\wd\myboxA% Scale phantom
\sbox\myboxB{$\m@th\overline{\copy\myboxB}$}% Overlined phantom
\setlength\mylenA{\the\wd\myboxA}% calc width diff
\addtolength\mylenA{-\the\wd\myboxB}%
\ifdim\wd\myboxB<\wd\myboxA%
\rlap{\hskip 0.5\mylenA\usebox\myboxB}{\usebox\myboxA}%
\else
\hskip -0.5\mylenA\rlap{\usebox\myboxA}{\hskip 0.5\mylenA\usebox\myboxB}%
\fi}
\makeatother
\begin{document}
$\dfrac{\bar{p}_1}{\bar{p}_1 + \bar{h}_1}$\quad
$\dfrac{\overline{p}_1}{\overline{p}_1 + \overline{h}_1}$\quad
$\dfrac{\xoverline[1.25]{p}_1}{\xoverline[1.25]{p}_1 + \xoverline[1.25]{h}_1}$
$\dfrac{\xoverline[1.50]{p}_1}{\xoverline[1.50]{p}_1 + \xoverline[1.50]{h}_1}$
\end{document}
```

## Best Answer

try

maybe this is what you want to achieve.