Curious

(define (fmod numerator denominator)
  (- numerator
     (* (floor (/ numerator denominator))
 denominator)))

(define (test-fmod numerator denominator)
  (let ((answer (fmod numerator denominator)))
    (if (> answer denominator)
 (begin (display "Whoops: ")
        (display (list numerator denominator answer))
        (newline)))))

1 ]=> (do ((i 0 (+ i 1))) ((>= i 1000)) (test-fmod (random 1.0) (random 1.0)))

; Value: #t

1 ]=> (test-fmod .59 .01)
Whoops: (.59 .01 1.0000000000000009e-2)
;Unspecified return value