diff --git a/col.go b/col.go
index 1e4d76e..c3a84d2 100644
--- a/col.go
+++ b/col.go
@@ -180,6 +180,10 @@ func (c *NumberCol) Debug(wb *WorkBook) {
 }
 
 func (c *NumberCol) String(wb *WorkBook) []string {
+	if wb.Debug {
+		fmt.Printf("number col dump:%#+v\n", c)
+	}
+
 	if v, ok := wb.Format(c.Index, c.Float); ok {
 		return []string{v}
 	}
diff --git a/format.go b/format.go
index 58342b7..13f0434 100644
--- a/format.go
+++ b/format.go
@@ -121,13 +121,14 @@ func (f *Format) Prepare() {
 	}
 
 	if TYPE_NUMERIC == f.vType || TYPE_CURRENCY == f.vType || TYPE_PERCENTAGE == f.vType {
-		var t []string
-		if t = strings.SplitN(f.Raw[0], ".", 2); 2 == len(t) {
+		if t := strings.SplitN(f.Raw[0], ".", 2); 2 == len(t) {
 			f.bts = strings.Count(t[1], "")
 
 			if f.bts > 0 {
 				f.bts = f.bts - 1
 			}
+		} else if t := strings.Index(f.Raw[0], "General"); t > 0 {
+			f.bts = -1
 		}
 	}
 }