Final answer:
The percent error of the baker's prediction is 16.9%.
Step-by-step explanation:
To find the percent error of the baker's prediction, we can use the formula:
Percent Error = (|Predicted Value - Actual Value| / Actual Value) * 100%
In this case, the predicted value is 98 cupcakes and the actual value is 118 cupcakes. Plugging these values into the formula, we get:
Percent Error = (|98 - 118| / 118) * 100%
Simplifying the expression, we have:
Percent Error = (20 / 118) * 100% = 16.9%