diff --git a/bicycle.go b/bicycle.go
index 0b99b99..913a861 100644
--- a/bicycle.go
+++ b/bicycle.go
@@ -217,8 +217,7 @@ func api_builder() {
 			year_result.Unit = DISTANCE_UNIT
 			if distances[i].StartTime.Year() == time.Now().Year() {
 				elapsed_days := time.Now().YearDay()
-				relation := float64(elapsed_days) * 100 / 365
-				year_result.Value = roundFloat(year_distance.Value*relation, 2)
+				year_result.Value = roundFloat(year_distance.Value*365/float64(elapsed_days), 2)
 			} else {
 				year_result = year_distance
 			}