diff --git a/metrics/grafana/ticdc.json b/metrics/grafana/ticdc.json
index 0f731ef7391..79e605dd679 100644
--- a/metrics/grafana/ticdc.json
+++ b/metrics/grafana/ticdc.json
@@ -7800,7 +7800,7 @@
           },
           "yaxes": [
             {
-              "format": "none",
+              "format": "percent",
               "label": null,
               "logBase": 1,
               "max": null,
diff --git a/pkg/sink/codec/common/compress.go b/pkg/sink/codec/common/compress.go
index fdf310223cb..dbcdce84451 100644
--- a/pkg/sink/codec/common/compress.go
+++ b/pkg/sink/codec/common/compress.go
@@ -28,7 +28,7 @@ func Compress(changefeedID model.ChangeFeedID, cc string, data []byte) ([]byte,
 	}
 
 	newSize := len(compressed)
-	ratio := float64(oldSize) / float64(newSize)
+	ratio := float64(oldSize) / float64(newSize) * 100
 
 	compressionRatio.WithLabelValues(changefeedID.Namespace, changefeedID.ID).Observe(ratio)
 
diff --git a/pkg/sink/kafka/metrics_collector.go b/pkg/sink/kafka/metrics_collector.go
index 4eced9a8810..1d624aa3c84 100644
--- a/pkg/sink/kafka/metrics_collector.go
+++ b/pkg/sink/kafka/metrics_collector.go
@@ -134,9 +134,9 @@ func (m *saramaMetricsCollector) collectProducerMetrics() {
 	if histogram, ok := compressionRatioMetric.(metrics.Histogram); ok {
 		compressionRatioGauge.
 			WithLabelValues(namespace, changefeedID, "avg").
-			Set(histogram.Snapshot().Mean() / 100)
+			Set(histogram.Snapshot().Mean())
 		compressionRatioGauge.WithLabelValues(namespace, changefeedID, p99).
-			Set(histogram.Snapshot().Percentile(0.99) / 100)
+			Set(histogram.Snapshot().Percentile(0.99))
 	}
 
 	recordsPerRequestMetric := m.registry.Get(recordsPerRequestMetricName)