Let $$x$$ be the number of small pieces Ozoda has.
The whole pizza is represented by 1. Ozoda has $$\frac{9}{10}$$ of the whole pizza.
Each small piece is $$\frac{3}{20}$$ of the whole pizza.
The total number of small pieces is the amount Ozoda has divided by the size of each piece.
$$x = \frac{\frac{9}{10}}{\frac{3}{20}} = \frac{9}{10} \div \frac{3}{20} = \frac{9}{10} \times \frac{20}{3} = \frac{9 \times 20}{10 \times 3} = \frac{180}{30} = 6$$
Therefore, Ozoda has 6 small pieces.
Answer: 6