Answer
The dictionary's price before the reduction is $ \$ 44 $.
Work Step by Step
Let $ x $ represents the dictionary's price before the reduction.
$ 30 \% $ of the dictionary's price is $ = (0.30)x $.
The price of the dictionary after reduction is $ \$ 30.80 $.
In mathematical form.
$ x-0.30x=30.80 $
$ (1-0.30)x=30.80 $
$ 0.70x=30.80 $
$ x=\frac{30.80}{0.70} $
$ x=44 $.
