diff --git a/test/os_darwin.go b/test/os_darwin.go
index 2d0e191..4e02981 100644
--- a/test/os_darwin.go
+++ b/test/os_darwin.go
@@ -91,10 +91,10 @@ func e() {
 	fmt.Printf("cpu total: %d\n", ct.Total)
 	fmt.Printf("cpu user: %d\n", ct.User)
 
-	fmt.Printf("cpu idle: %f%%\n", ct.Idle*100/ct.Total)
-	fmt.Printf("cpu nice: %f%%\n", ct.Nice*100/ct.Total)
-	fmt.Printf("cpu system: %f%%\n", ct.System*100/ct.Total)
-	fmt.Printf("cpu user: %f%%\n", ct.User*100/ct.Total)
+	fmt.Printf("cpu idle: %f%%\n", float64(ct.Idle*100)/float64(ct.Total))
+	fmt.Printf("cpu nice: %f%%\n", float64(ct.Nice*100)/float64(ct.Total))
+	fmt.Printf("cpu system: %f%%\n", float64(ct.System*100)/float64(ct.Total))
+	fmt.Printf("cpu user: %f%%\n", float64(ct.User*100)/float64(ct.Total))
 }
 
 func f() {
diff --git a/test/os_linux.go b/test/os_linux.go
index 07f1af4..2d59807 100644
--- a/test/os_linux.go
+++ b/test/os_linux.go
@@ -105,14 +105,14 @@ func e() {
 	fmt.Printf("cpu steal: %d\n", ct.Steal)
 	fmt.Printf("cpu total: %d\n", ct.Total)
 
-	fmt.Printf("cpu user: %f%%\n", ct.User*100/ct.Total)
-	fmt.Printf("cpu nice: %f%%\n", ct.Nice*100/ct.Total)
-	fmt.Printf("cpu system: %f%%\n", ct.System*100/ct.Total)
-	fmt.Printf("cpu idle: %f%%\n", ct.Idle*100/ct.Total)
-	fmt.Printf("cpu iowait: %f%%\n", ct.Iowait*100/ct.Total)
-	fmt.Printf("cpu irq: %f%%\n", ct.Irq*100/ct.Total)
-	fmt.Printf("cpu softirq: %f%%\n", ct.Softirq*100/ct.Total)
-	fmt.Printf("cpu steal: %f%%\n", ct.Steal*100/ct.Total)
+	fmt.Printf("cpu user: %f%%\n", float64(ct.User*100)/float64(ct.Total))
+	fmt.Printf("cpu nice: %f%%\n", float64(ct.Nice*100)/float64(ct.Total))
+	fmt.Printf("cpu system: %f%%\n", float64(ct.System*100)/float64(ct.Total))
+	fmt.Printf("cpu idle: %f%%\n", float64(ct.Idle*100)/float64(ct.Total))
+	fmt.Printf("cpu iowait: %f%%\n", float64(ct.Iowait*100)/float64(ct.Total))
+	fmt.Printf("cpu irq: %f%%\n", float64(ct.Irq*100)/float64(ct.Total))
+	fmt.Printf("cpu softirq: %f%%\n", float64(ct.Softirq*100)/float64(ct.Total))
+	fmt.Printf("cpu steal: %f%%\n", float64(ct.Steal*100)/float64(ct.Total))
 }
 func f() {
 	disks, err := disk.Get()