1 files changed, 19 insertions, 0 deletions
diff --git a/internal/percentage.go b/internal/percentage.go
new file mode 100644
index 0000000..4bc36f5
--- /dev/null
+++ b/internal/percentage.go
@@ -0,0 +1,19 @@
+package internal
+
+import "math"
+
+// Percentage is a helper function, to calculate percentage.
+func Percentage(total, current int64, width uint) float64 {
+	if total <= 0 {
+		return 0
+	}
+	if current >= total {
+		return float64(width)
+	}
+	return float64(int64(width)*current) / float64(total)
+}
+
+// PercentageRound same as Percentage but with math.Round.
+func PercentageRound(total, current int64, width uint) float64 {
+	return math.Round(Percentage(total, current, width))
+}