diff --git a/collector/pool_test.go b/collector/pool_test.go
index c7b0796..bd3c65b 100644
--- a/collector/pool_test.go
+++ b/collector/pool_test.go
@@ -164,6 +164,21 @@ zfs_pool_health{pool="suspendedpool"} 6
 			metricResults: `# HELP zfs_pool_unsupported !!! This property is unsupported, results are likely to be undesirable, please file an issue at https://github.com/pdf/zfs_exporter/issues to have this property supported !!!
 # TYPE zfs_pool_unsupported gauge
 zfs_pool_unsupported{pool="testpool"} 1024
+`,
+		},
+		{
+			name:           `legacy fragmentation`,
+			pools:          []string{`testpool`},
+			propsRequested: []string{`fragmentation`},
+			metricNames:    []string{`zfs_pool_fragmentation_ratio`},
+			propsResults: map[string]map[string]string{
+				`testpool`: {
+					`fragmentation`: `5%`,
+				},
+			},
+			metricResults: `# HELP zfs_pool_fragmentation_ratio The fragmentation ratio of the pool.
+# TYPE zfs_pool_fragmentation_ratio gauge
+zfs_pool_fragmentation_ratio{pool="testpool"} 0.05
 `,
 		},
 	}
diff --git a/collector/transform.go b/collector/transform.go
index add3127..e931e97 100644
--- a/collector/transform.go
+++ b/collector/transform.go
@@ -62,6 +62,9 @@ func transformBool(value string) (float64, error) {
 }
 
 func transformPercentage(value string) (float64, error) {
+	if len(value) > 0 && value[len(value)-1] == '%' {
+		value = value[:len(value)-1]
+	}
 	v, err := transformNumeric(value)
 	if err != nil {
 		return -1, err