Mathematically an **approximately equal** symbol is formed by two **similar to** symbols. And the approximate symbol is denoted by the `\approx`

and `\thickapprox`

commands.

```
\documentclass{article}
\usepackage{amssymb}
\begin{document}
\[ p \approx q \]
\[ p \thickapprox q \]
\end{document}
```

**Output :**

Notice in the program above that the `amssymb`

package has been used for the `\thickapprox`

command.

You can also use more than one symbol with approximate symbols. For example equals, less than, grater than, etc.

```
\documentclass{article}
\usepackage{amssymb}
\begin{document}
\[
\begin{matrix}
\lessapprox & \gtrapprox & \approxeq \\[6pt]
\lnapprox & \gnapprox & \precapprox \\[6pt]
\succapprox & \precnapprox & \succnapprox
\end{matrix}
\]
\end{document}
```

**Output :**

However, to represent each of the above symbols you need to take the help of the `amssymb`

package.