diff --git a/src/bigunit.ts b/src/bigunit.ts
index c50f410..924ba41 100644
--- a/src/bigunit.ts
+++ b/src/bigunit.ts
@@ -21,6 +21,7 @@ export interface IBigUnitDTO extends IBigUnitObject {
   decimalValue: string;
   name?: string;
 }
+
 export class BigUnit {
   constructor(
     public value: bigint,
@@ -179,8 +180,10 @@ export class BigUnit {
    * @param fraction
    * @returns new BigUnit with the result value in the same precision
    */
-  public fraction(numerator: number, denominator: number): BigUnit {
-    if (isNaN(numerator) || isNaN(denominator)) {
+  public fraction(numerator: BigUnitish, denominator: BigUnitish): BigUnit {
+    const numeratorNumber = Number(numerator);
+    const denominatorNumber = Number(denominator);
+    if (isNaN(numeratorNumber) || isNaN(denominatorNumber)) {
       throw new InvalidFractionError(
         "Numerator and denominator must be valid numbers",
       );
@@ -191,8 +194,9 @@ export class BigUnit {
       throw new DivisionByZeroError();
     }
 
-    const bigUnitNumerator = BigUnit.from(numerator, this.precision);
-    const bigUnitDenominator = BigUnit.from(denominator, this.precision);
+    const bigUnitNumerator = BigUnit.from(numeratorNumber, this.precision);
+    const bigUnitDenominator = BigUnit.from(denominatorNumber, this.precision);
+
     const resultValue = this.mul(bigUnitNumerator).div(bigUnitDenominator);
     // Return a new BigUnit with the result value and the same precision
     return resultValue;
@@ -203,7 +207,7 @@ export class BigUnit {
    * @param percent
    * @returns new BigUnit with the result value in the same precision
    */
-  public percent(percent: number): BigUnit {
+  public percent(percent: BigUnitish): BigUnit {
     return this.fraction(percent, 100);
   }
 
diff --git a/test/bigunit.fractions.test.ts b/test/bigunit.fractions.test.ts
index a853b62..138c843 100644
--- a/test/bigunit.fractions.test.ts
+++ b/test/bigunit.fractions.test.ts
@@ -6,7 +6,7 @@ describe("BigUnit Class fraction handling methods", () => {
   const bigUnit = new BigUnit(value, precision);
 
   describe("percent method", () => {
-    test("should calculate the correct percent with a valid percentage", () => {
+    test("should calculate the correct percent with a valid number percentage", () => {
       const percentage = 10; // 10%
       const result = bigUnit.percent(percentage);
       const expectedValue = 1000n; // 10% of 10000n is 1000n
@@ -15,6 +15,33 @@ describe("BigUnit Class fraction handling methods", () => {
       expect(result.precision).toBe(precision);
     });
 
+    test("should calculate the correct percent with a valid string percentage", () => {
+      const percentage = "10"; // 10%
+      const result = bigUnit.percent(percentage);
+      const expectedValue = 1000n; // 10% of 10000n is 1000n
+
+      expect(result.value).toBe(expectedValue);
+      expect(result.precision).toBe(precision);
+    });
+
+    test("should calculate the correct percent with a valid BigInt percentage", () => {
+      const percentage = 10n; // 10%
+      const result = bigUnit.percent(percentage);
+      const expectedValue = 1000n; // 10% of 10000n is 1000n
+
+      expect(result.value).toBe(expectedValue);
+      expect(result.precision).toBe(precision);
+    });
+
+    test("should calculate the correct percent with a valid Bigunit percentage", () => {
+      const percentage = new BigUnit(10n, 0); // 10%
+      const result = bigUnit.percent(percentage);
+      const expectedValue = 1000n; // 10% of 10000n is 1000n
+
+      expect(result.value).toBe(expectedValue);
+      expect(result.precision).toBe(precision);
+    });
+
     test("should handle zero percent correctly", () => {
       const percentage = 0; // 0%
       const result = bigUnit.percent(percentage);
@@ -33,7 +60,7 @@ describe("BigUnit Class fraction handling methods", () => {
   });
 
   describe("fraction method", () => {
-    test("should calculate the correct fraction with valid numerator and denominator", () => {
+    test("should calculate the correct fraction with valid number type numerator and denominator", () => {
       const numerator = 1;
       const denominator = 2; // 1/2
       const result = bigUnit.fraction(numerator, denominator);
@@ -43,6 +70,36 @@ describe("BigUnit Class fraction handling methods", () => {
       expect(result.precision).toBe(precision);
     });
 
+    test("should calculate the correct fraction with valid string type numerator and denominator", () => {
+      const numerator = "1";
+      const denominator = "2"; // 1/2
+      const result = bigUnit.fraction(numerator, denominator);
+      const expectedValue = 5000n; // 1/2 of 10000n is 5000n
+
+      expect(result.value).toBe(expectedValue);
+      expect(result.precision).toBe(precision);
+    });
+
+    test("should calculate the correct fraction with valid BigInt type numerator and denominator", () => {
+      const numerator = 1n;
+      const denominator = 2n; // 1/2
+      const result = bigUnit.fraction(numerator, denominator);
+      const expectedValue = 5000n; // 1/2 of 10000n is 5000n
+
+      expect(result.value).toBe(expectedValue);
+      expect(result.precision).toBe(precision);
+    });
+
+    test("should calculate the correct fraction with valid Bigunit type numerator and denominator", () => {
+      const numerator = new BigUnit(1n, 0);
+      const denominator = new BigUnit(2n, 0); // 1/2
+      const result = bigUnit.fraction(numerator, denominator);
+      const expectedValue = 5000n; // 1/2 of 10000n is 5000n
+
+      expect(result.value).toBe(expectedValue);
+      expect(result.precision).toBe(precision);
+    });
+
     test("should handle zero numerator correctly", () => {
       const numerator = 0;
       const denominator = 2; // 0/2