diff --git a/decor/percentage_test.go b/decor/percentage_test.go
index bbddf5b..a3ad458 100644
--- a/decor/percentage_test.go
+++ b/decor/percentage_test.go
@@ -56,3 +56,55 @@
 		})
 	}
 }
+
+func TestPercentageDecor(t *testing.T) {
+	cases := []struct {
+		name     string
+		fmt      string
+		current  int64
+		total    int64
+		expected string
+	}{
+		{
+			name:     "tot:100 cur:0 fmt:none",
+			fmt:      "",
+			current:  0,
+			total:    100,
+			expected: "0 %",
+		},
+		{
+			name:     "tot:100 cur:10 fmt:none",
+			fmt:      "",
+			current:  10,
+			total:    100,
+			expected: "10 %",
+		},
+		{
+			name:     "tot:100 cur:10 fmt:%.2f",
+			fmt:      "%.2f",
+			current:  10,
+			total:    100,
+			expected: "10.00%",
+		},
+		{
+			name:     "tot:99 cur:10 fmt:%.2f",
+			fmt:      "%.2f",
+			current:  11,
+			total:    99,
+			expected: "11.11%",
+		},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			decor := NewPercentage(tc.fmt)
+			stat := Statistics{
+				Total:   tc.total,
+				Current: tc.current,
+			}
+			res, _ := decor.Decor(stat)
+			if res != tc.expected {
+				t.Fatalf("expected: %q, got: %q\n", tc.expected, res)
+			}
+		})
+	}
+}