The percent error is 4.17 %
Solution:
To be labeled as a jumbo egg, the egg is supposed to weight 2.5 oz
When Desmond buys a carton of jumbo eggs, the weight of one is 2.4 oz
To find: percent error
Percent error is the difference between a measured and known value, divided by the known value, multiplied by 100%
Here approximate value = 2.5 oz and exact value = 2.4 oz
Therefore percent error is 4.17 %