diff --git a/TODO b/TODO
index 2fc0601b..13b688e3 100644
--- a/TODO
+++ b/TODO
@@ -20,7 +20,7 @@ Tier 1:
     - destruc.scm
     - diviter.scm
     - divrec.scm
-    - dynamic.scm - Need to handle optional radix argument to number->string
+    - dynamic.scm
     - earley.scm
     - equal.scm
     - fft.scm
diff --git a/scheme/base.sld b/scheme/base.sld
index 94a86b7b..e9f0d664 100644
--- a/scheme/base.sld
+++ b/scheme/base.sld
@@ -157,6 +157,8 @@
     bytevector-copy
     utf8->string
     string->utf8
+    denominator
+    numerator
 
 ;;;;
 ; Possibly missing functions:
@@ -179,10 +181,6 @@
 ;    ; No complex or rational numbers at this time
 ;    rationalize
 ;
-;    ; Need to change how  integer? works, to include floatings points without any decimals
-;    denominator
-;    numerator
-;
 ;    ; need string ports
 ;    ; may be able to use POSIX string steams for this, see: open_memstream
 ;    ; however there may be portability issues with that. looks like BSD and windows don't have it
@@ -1009,6 +1007,10 @@
       (foldl lcm/main (car nums) (cdr nums))))
   ;; END gcd lcm
 
+  ;; Placeholders
+  (define (denominator n) 1)
+  (define (numerator n) n)
+
   ;; TODO: possibly not correct, just a placeholder
   (define quotient /)