diff --git a/BigRational.js b/BigRational.js
index 0bbafb2..5f76793 100644
--- a/BigRational.js
+++ b/BigRational.js
@@ -171,7 +171,7 @@
                 decPart = decPart.slice(0, -1);
             }
         }
-		if(digits < 1) decPart = "";
+        if(digits < 1) decPart = "";
         if (this.isNegative()) {
           intPart = "-"+intPart;
         }
@@ -186,9 +186,9 @@
     };
 
     BigRational.prototype.valueOf = function () {
-		if(!isFinite(+this.num) || !isFinite(+this.denom)) {
-			return +this.toDecimal(64);
-		}
+        if(!isFinite(+this.num) || !isFinite(+this.denom)) {
+            return +this.toDecimal(64);
+        }
         return this.num / this.denom;
     };
 
@@ -238,6 +238,18 @@
         return new BigRational(bigInt(n), bigInt[1]);
     }
     function parse(a, b) {
+        if(
+            a!==null
+            && !(a instanceof BigRational)
+            && ! bigInt.isInstance(a)
+
+            && a instanceof Object
+            && typeof a === 'object'
+        )
+        {
+            b = a["denom"] || a["denominator"];
+            a = a["num"] || a["numerator"];
+        }
         if(!a) {
             return new BigRational(bigInt(0), bigInt[1]);
         }
@@ -253,6 +265,15 @@
         var denom;
 
         var text = String(a);
+        var percents = text.split("%");
+        if(percents.length>2){
+            throw new Error("Invalid input: too many '%' tokens");
+        }
+        if(percents.length>1){
+            text = percents[0];
+            var percent = true;
+        }
+        
         var texts = text.split("/");
         if(texts.length > 2) {
             throw new Error("Invalid input: too many '/' tokens");
@@ -271,11 +292,11 @@
                     num = num.subtract(parts[1]);
                 }
                 denom = bigInt(texts[1]);
-                return reduce(num, denom);
+                return (percent) ? reduce(num, denom).divide(bigRat('100')) : reduce(num, denom);
             }
-            return reduce(bigInt(texts[0]), bigInt(texts[1]));
+            return (percent) ? reduce(bigInt(texts[0]), bigInt(texts[1])).divide(bigRat('100')) : reduce(bigInt(texts[0]), bigInt(texts[1]));
         }
-        return parseDecimal(text);
+        return (percent) ? parseDecimal(text).divide(bigRat('100')) : parseDecimal(text);
     }
 
     parse.zero = parse(0);
diff --git a/test/SpecRunner.html b/test/SpecRunner.html
index ece89e0..22ce2bd 100644
--- a/test/SpecRunner.html
+++ b/test/SpecRunner.html
@@ -12,9 +12,9 @@
   <script src="lib/jasmine-2.1.3/boot.js"></script>
 
   <!-- include source files here... -->
-  <script src="http://peterolson.github.com/BigInteger.js/BigInteger.min.js"></script>
+  <script src="https://username1565.github.io/BigInteger.js/BigInteger.js"></script>
   <script src="../BigRational.js"></script>
-
+  
   <!-- include spec files here... -->
   <script src="spec.js"></script>
 
diff --git a/test/spec.js b/test/spec.js
index 83853bb..168809d 100644
--- a/test/spec.js
+++ b/test/spec.js
@@ -140,6 +140,24 @@ describe("BigRational", function () {
             expect(bigRat(1, 4096).toDecimal(5) === "0.00024").toBe(true);
             expect(bigRat(-1).toDecimal() === "-1").toBe(true);
 			expect(bigRat(6.543).toDecimal(0) === "6").toBe(true); // Issue #30
+			
+			//test percents
+			expect(bigRat("0.35%").toDecimal() === "0.0035").toBe(true); // Issue #22
+			expect(bigRat("354.25%").toDecimal(2) === "3.54").toBe(true);
+			expect(bigRat("2_1/3%").toDecimal(64) === "0.0233333333333333333333333333333333333333333333333333333333333333").toBe(true);
+			expect(bigRat("1/3%").toDecimal(0) === "0").toBe(true);
+			expect(bigRat("0.00003%").toDecimal() === "0.0000003").toBe(true);
+			
+			//test percents
+			expect(bigRat('0.35%').toString() === "7/2000").toBe(true); 		// Issue #22
+			expect(bigRat("354.25%").toString() === "1417/400").toBe(true);
+			expect(bigRat("2_1/3%").toString() === "7/300").toBe(true);
+			expect(bigRat("1/3%").toString() === "1/300").toBe(true);
+			expect(bigRat("0.00003%").toString() === "3/10000000").toBe(true);
+		
+			//test bigrational from json stringify object							//Issue #26
+			expect(bigRat(JSON.parse(JSON.stringify(bigRat("2_1/3")))).toString() === "7/3").toBe(true);
+		
         });
     });
     describe("toString", function () {
@@ -157,4 +175,4 @@ describe("BigRational", function () {
 			expect(+bigRat("1e350").add("1").over("2e350") === 0.5).toBe(true); // Issue #31
         });
     });
-});
\ No newline at end of file
+});