Unless you know what the exact value is, you cannot say what the error is.
Assuming that the actual value has been rounded to 2dp ( to 1.30), the best that you can say is that the maximum absolute error is 0.005, which means that the maximum absolute relative error is 0.005/1.30 and that the maximum percentage error (plus or minus) is, 100×0.005/1.30, approximately 0.385.
