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Author: NoureldinYosri

tunits/core/cython/frac.pyx

@@ -84,11 +84,12 @@ cpdef frac float_to_twelths_frac(a) except *:
         return frac_least_terms(a, 1)
 
     cdef double d = float(a)
-    cdef long long x = <long long>c_floor(12*d + 0.5)
-    if not (-1e-5 < 12*d - x < 1e-5):
-        print(12*d - x)
-        print(12*d - <long long>(12*d))
-        print(<long long>(12*d), x)
+    cdef double raised_d = 12.0*d
+    cdef long long x = <long long>c_floor(raised_d + 0.5)
+    if not (-1e-5 < raised_d - x < 1e-5):
+        print(raised_d)
+        print(raised_d - <long long>(raised_d))
+        print(<long long>(raised_d), x)
         raise ValueError("Not a twelfth.")
 
     return frac_least_terms(x, 12)