diff --git a/lib/core.js b/lib/core.js
index ea64d05..40416c8 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -80,16 +80,12 @@ module.exports = {
           this.chart.ctx.font = fontSize + "em 'Open Sans'"
           this.chart.ctx.textBaseline = 'middle'
 
-          var total = 0
-          var filled = 0
+          var total = this.total
           var clone = this.segments.slice()
-          clone.map(function (val) {
-            total = total + val.value
-          })
           clone.pop()
-          clone.map(function (val) {
-            filled = filled + val.value
-          })
+          var filled = clone.reduce(function (a, val) {
+            return  a + val.value
+          }, 0)
 
           var text = Math.round(total > 0 ? (100 / total) * filled : 0) + '%'
           var textX = Math.round((width - this.chart.ctx.measureText(text).width) / 2),