1. Understand the Error:

* The measurement is accurate to the nearest 10 milliliters. This means the actual capacity could be 5 milliliters above or below the measured 1.25 liters.

* The maximum error is 5 milliliters.

2. Convert to Liters:

* 1000 milliliters (ml) = 1 liter (L)

* 5 milliliters = 0.005 liters

3. Calculate the Percentage Error:

* Percentage error = (Maximum Error / Measured Value) * 100%

* Percentage error = (0.005 L / 1.25 L) * 100%

* Percentage error = 0.4%

Therefore, the percentage error for this measurement is 0.4%.