Recall that leverage is the total assets to equity ratio. This is given by the expression

$$L = \frac{\text{Assets}}{\text{Equity}}$$

But from the accounting equation: Assets = Total Equities + Total Liabilities

$$\Rightarrow \text{Assets} = 759 + 104 = 863$$ $$\Rightarrow L = \frac{863}{104} = 8.3$$