diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourcesPerDay.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourcesPerDay.java
index 2d52d7f85..5e7427478 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourcesPerDay.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourcesPerDay.java
@@ -27,7 +27,10 @@ import org.apache.commons.lang.Validate;
 
 public class ResourcesPerDay {
 
-    private final BigDecimal amount;
+    public static ResourcesPerDay calculateFrom(int hoursWorking, int workableHours) {
+        return amount(new BigDecimal(hoursWorking).divide(new BigDecimal(
+                workableHours), 2, RoundingMode.HALF_UP));
+    }
 
     public static ResourcesPerDay amount(int amount) {
         return new ResourcesPerDay(new BigDecimal(amount));
@@ -37,6 +40,8 @@ public class ResourcesPerDay {
         return new ResourcesPerDay(decimal);
     }
 
+    private final BigDecimal amount;
+
     private ResourcesPerDay(BigDecimal amount) {
         Validate.isTrue(amount.intValue() >= 0);
         this.amount = amount.setScale(2, RoundingMode.HALF_UP);
@@ -73,4 +78,10 @@ public class ResourcesPerDay {
         return withoutDecimalpart.intValue() == 0;
     }
 
+    @Override
+    public String toString() {
+        return amount.toString();
+    }
+
+
 }
diff --git a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/ResourcesPerDayTest.java b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/ResourcesPerDayTest.java
index 446669589..6acc64e39 100644
--- a/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/ResourcesPerDayTest.java
+++ b/navalplanner-business/src/test/java/org/navalplanner/business/test/planner/entities/ResourcesPerDayTest.java
@@ -72,7 +72,7 @@ public class ResourcesPerDayTest {
             @Override
             public void describeTo(Description description) {
                 description.appendText("must have an integer part of"
-                        + integerPart);
+                        + integerPart + " and ");
                 description.appendText("must have " + decimalPart
                         + " as decimal part");
             }
@@ -105,7 +105,6 @@ public class ResourcesPerDayTest {
         }
     }
 
-
     @Test
     public void canBeConvertedToHoursGivenTheWorkingDayHours() {
         ResourcesPerDay units = ResourcesPerDay.amount(2);
@@ -146,4 +145,23 @@ public class ResourcesPerDayTest {
         }
     }
 
+    @SuppressWarnings("unchecked")
+    @Test
+    public void canCalculateTheResourcesPerDayFromTheHoursWorkingAndTheWorkableHours() {
+        Object[] periodicalNumber = { ResourcesPerDay.calculateFrom(10, 3),
+                readsAs(3, 33) };
+        Object[][] examples = {
+                { ResourcesPerDay.calculateFrom(1000, 1000), readsAs(1, 00) },
+                { ResourcesPerDay.calculateFrom(2000, 1000), readsAs(2, 00) },
+                { ResourcesPerDay.calculateFrom(500, 1000), readsAs(0, 50) },
+                { ResourcesPerDay.calculateFrom(651, 1000), readsAs(0, 65) },
+                { ResourcesPerDay.calculateFrom(1986, 1000), readsAs(1, 99) },
+                periodicalNumber };
+        for (Object[] pair : examples) {
+            ResourcesPerDay first = (ResourcesPerDay) pair[0];
+            Matcher<ResourcesPerDay> matcher = (Matcher<ResourcesPerDay>) pair[1];
+            assertThat(first, matcher);
+        }
+    }
+
 }