Which forecasting method takes a fraction error into account for the net period forecast?

The forecasting method that takes a fraction error into account is the Mean Absolute Percentage Error (MAPE). MAPE calculates the accuracy of a forecasting method by expressing the forecast error as a percentage of the actual values, allowing for a more intuitive understanding of forecast accuracy. This method is particularly useful as it normalizes errors, making it easier to compare forecasting performance across different scales.