If 5 wheat crackers represent 5% of the entire box, we can find the total number of crackers in the box using the formula:
\[ \text{Total crackers} = \frac{\text{Number of crackers eaten}}{\text{Percentage eaten}} \]
In this case:
\[ \text{Total crackers} = \frac{5}{0.05} \]
Calculating this gives:
\[ \text{Total crackers} = 100 \]
So, there were 100 crackers in the box.