refactoring: Avoided Duplication of Code in Function frac_to_dec by utilizing the already implemented functions

src/main/py/fractions.py

@@ -1,7 +1,8 @@
 from src.main.py.more_advanced_calculations import gcd, lcm
+from src.main.py.primitive_calculations import *
 
 def frac_to_dec(num, denom):
-    return num/denom
+    return divide(num, denom)
 
 def dec_to_frac(dec_number):
     return dec_number.as_integer_ratio()