To find the ratio of balls hit to left field to balls hit to right field, we divide the number of balls hit to left field by the number of balls hit to right field.
There were 7 balls hit to left field and 8 balls hit to right field.
So, the calculation is:
\[ \text{Ratio} = \frac{\text{Balls to Left Field}}{\text{Balls to Right Field}} = \frac{7}{8} = 0.875 \]
Rounding 0.875 to the nearest hundredth gives us 0.88.
Therefore, the answer is:
0.88