diff --git a/src/lemke/bimatrix.py b/src/lemke/bimatrix.py
index 3fe447b..fd7d65f 100644
--- a/src/lemke/bimatrix.py
+++ b/src/lemke/bimatrix.py
@@ -661,7 +661,7 @@ def trace_uniform_cmd(filename, decimals):
     show_default=True,
     type=click.IntRange(1, MAX_ACCURACY),
     metavar="INTEGER",
-    help="Denominator x: each coordinate of the prior is rounded to the nearest 1/x",
+    help="Denominator x: prior coordinates are rounded to multiples of 1/x that sum to 1",
 )
 def trace_random_cmd(filename, decimals, priors, seed, accuracy):
     """Trace using random prior(s)."""
diff --git a/src/lemke/randomstart.py b/src/lemke/randomstart.py
index 50f389e..c474aeb 100644
--- a/src/lemke/randomstart.py
+++ b/src/lemke/randomstart.py
@@ -170,7 +170,7 @@ def plot_simplex(numpoints=200, accuracy=20, higherdim=3, naiveplot=False):
     "--accuracy",
     default=20,
     show_default=True,
-    help="Denominator x: each coordinate is rounded to the nearest multiple of 1/x",
+    help="Denominator x: coordinates are rounded to multiples of 1/x that sum to 1",
     type=click.IntRange(1, MAX_ACCURACY),
     metavar="INTEGER",
 )