Round Arkansas deduction allocation fraction to nearest whole percent

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    fixed:
+    - Round Arkansas deduction allocation fraction to nearest whole percent.

policyengine_us/tests/policy/baseline/gov/states/ar/tax/income/deductions/itemized/ar_itemized_deductions_indiv.yaml

@@ -59,3 +59,24 @@
         state_code: AR 
   output:
     ar_itemized_deductions_indiv: [1_000, 0]
+
+- name: Split the itemized deductions 60% and 40%, rounded to the nearest %
+  period: 2022
+  input:
+    people:
+      person1:
+        is_tax_unit_head: true
+        ar_agi_indiv: 61_334
+      person2:
+        is_tax_unit_head: false
+        ar_agi_indiv: 42_129
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+        ar_medical_expense_deduction_indiv: 1_000
+    households:
+      household:
+        members: [person1, person2]
+        state_code: AR 
+  output:
+    ar_itemized_deductions_indiv: [590, 410]

policyengine_us/variables/gov/states/ar/tax/income/deductions/itemized/ar_itemized_deductions_indiv.py

@@ -22,6 +22,10 @@ def formula(person, period, parameters):
         prorate = np.zeros_like(total_agi)
         mask = total_agi > 0
         prorate[mask] = person_agi[mask] / total_agi[mask]
+
+        # Round prorate to the nearest percent and then divide by 100
+        prorate = np.round(prorate * 100) / 100
+
         # Dependents should always return 0 as their AGI is always
         # attributed to the head of the tax unit in ar_agi
         return unit_deds * prorate