Simon is expecting a new baby sister. Simon predicts the baby will weigh 6 and one - half pounds at birth. Calculate the percent error of Simon's estimate if the baby's weight at birth is 8 and one- quarter pounds 25%, 0.21%, -21%, 21%

To calculate the percent error, we first need to find the difference between Simon's estimate and the actual weight of the baby.

Actual weight = 8 and one-quarter pounds = 8.25 pounds
Simon's estimate = 6 and one-half pounds = 6.5 pounds

Difference = Actual weight - Simon's estimate = 8.25 pounds - 6.5 pounds = 1.75 pounds

Now, let's calculate the percent error using the formula:

Percent Error = (Difference / Actual weight) x 100

Percent Error = (1.75 / 8.25) x 100 ≈ 21.21%

Therefore, the percent error of Simon's estimate is approximately 21%.