diff --git a/data_structures/stacks/largest_rectangle_histogram.py b/data_structures/stacks/largest_rectangle_histogram.py
new file mode 100644
index 000000000000..7575bd9f628d
--- /dev/null
+++ b/data_structures/stacks/largest_rectangle_histogram.py
@@ -0,0 +1,39 @@
+def largest_rectangle_area(heights: list[int]) -> int:
+    """
+    Inputs an array of integers representing the heights of bars,
+    and returns the area of the largest rectangle that can be formed
+
+    >>> largest_rectangle_area([2, 1, 5, 6, 2, 3])
+    10
+
+    >>> largest_rectangle_area([2, 4])
+    4
+
+    >>> largest_rectangle_area([6, 2, 5, 4, 5, 1, 6])
+    12
+
+    >>> largest_rectangle_area([1])
+    1
+    """
+    stack: list[int] = []
+    max_area = 0
+    heights = [*heights, 0]  # make a new list by appending the sentinel 0
+    n = len(heights)
+
+    for i in range(n):
+        # make sure the stack remains in increasing order
+        while stack and heights[i] < heights[stack[-1]]:
+            h = heights[stack.pop()]  # height of the bar
+            # if stack is empty, it means entire width can be taken from index 0 to i-1
+            w = i if not stack else i - stack[-1] - 1  # calculate width
+            max_area = max(max_area, h * w)
+
+        stack.append(i)
+
+    return max_area
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()
diff --git a/maths/decimal_to_fraction.py b/maths/decimal_to_fraction.py
index 2aa8e3c3dfd6..be42b9fb3b5a 100644
--- a/maths/decimal_to_fraction.py
+++ b/maths/decimal_to_fraction.py
@@ -16,6 +16,20 @@ def decimal_to_fraction(decimal: float | str) -> tuple[int, int]:
     >>> decimal_to_fraction("78td")
     Traceback (most recent call last):
     ValueError: Please enter a valid number
+    >>> decimal_to_fraction(0)
+    (0, 1)
+    >>> decimal_to_fraction(-2.5)
+    (-5, 2)
+    >>> decimal_to_fraction(0.125)
+    (1, 8)
+    >>> decimal_to_fraction(1000000.25)
+    (4000001, 4)
+    >>> decimal_to_fraction(1.3333)
+    (13333, 10000)
+    >>> decimal_to_fraction("1.23e2")
+    (123, 1)
+    >>> decimal_to_fraction("0.500")
+    (1, 2)
     """
     try:
         decimal = float(decimal)
@@ -34,8 +48,8 @@ def decimal_to_fraction(decimal: float | str) -> tuple[int, int]:
             if remainder == 0:
                 break
             dividend, divisor = divisor, remainder
-        numerator, denominator = numerator / divisor, denominator / divisor
-        return int(numerator), int(denominator)
+        numerator, denominator = numerator // divisor, denominator // divisor
+        return numerator, denominator
 
 
 if __name__ == "__main__":