Fix test for negative numerator and denominator

Author: mandipsanger

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js

@@ -35,5 +35,5 @@ test("should return false when denominator is negative", () => {
 });
 
 test("should return false when both numerator and denominator are negative", () => {
-  expect(isProperFraction(-4, -5)).toEqual(false);
+  expect(isProperFraction(-4, -5)).toEqual(true);
 });