diff --git a/src/box/lua/slab.cc b/src/box/lua/slab.cc
index 6b0fe31929e9b3dbcc2adb14424619b7371cebe3..f7e298157ec1fe1b12f7dc780223e0ce8c05a1d9 100644
--- a/src/box/lua/slab.cc
+++ b/src/box/lua/slab.cc
@@ -99,19 +99,19 @@ lbox_slab_info(struct lua_State *L)
 	lua_settable(L, -3);
 
 	char value[32];
-	double items_used_perc = 100
+	double items_used_ratio = 100
 		* ((double)totals.used)
 		/ ((double)talloc.cache->arena->prealloc + 0.0001);
-	snprintf(value, sizeof(value), "%0.1lf%%", items_used_perc);
-	lua_pushstring(L, "items_used_%");
+	snprintf(value, sizeof(value), "%0.1lf%%", items_used_ratio);
+	lua_pushstring(L, "items_used_ratio");
 	lua_pushstring(L, value);
 	lua_settable(L, -3);
 
-	double arena_used_perc = 100
+	double arena_used_ratio = 100
 		* ((double)talloc.cache->arena->used)
 		/ ((double)talloc.cache->arena->prealloc + 0.0001);
-	snprintf(value, sizeof(value), "%0.1lf%%", arena_used_perc);
-	lua_pushstring(L, "arena_used_%");
+	snprintf(value, sizeof(value), "%0.1lf%%", arena_used_ratio);
+	lua_pushstring(L, "arena_used_ratio");
 	lua_pushstring(L, value);
 	lua_settable(L, -3);
 
diff --git a/test/box/misc.result b/test/box/misc.result
index 16611f5ec8b175d9844c6450cbc7b81e3b162c97..ec95c64ce25565b62d838d082662c52223cf5f73 100644
--- a/test/box/misc.result
+++ b/test/box/misc.result
@@ -147,9 +147,9 @@ end;
 ...
 t;
 ---
-- - arena_used_%
+- - arena_used_ratio
+  - items_used_ratio
   - arena_used
-  - items_used_%
   - arena_size
   - slabs
 ...