diff --git a/avail.sh b/avail.sh
index f37542b..cac6730 100755
--- a/avail.sh
+++ b/avail.sh
@@ -65,7 +65,7 @@ if [[ $mode == "s" ]]; then
     diagram="${diagram}[server]\n"
     eq="${eq} * 100"
     answer=$(echo "scale=9; $eq" | bc)
-    answershort=$(echo "$answer" | sed 's/\(\.[^0]\+\)0\+/\1/')
+    answershort=$(echo "$answer" | sed '/\./ s/\.\{0,1\}0\{1,\}$//')
     if [[ $answershort == 99.* ]]; then
         nines=$(echo $answershort | tr -d -C 9 | wc -c | tr -d ' ')
         [[ $nines -eq 1 ]] && ess="" || ess="s"
@@ -186,7 +186,7 @@ elif [[ $mode == "p" ]]; then
 
     eq="(1 - (1 - (${sysuptime}/100))^${nsites})*100"
     answer=$(echo "scale=15; $eq" | bc)
-    answershort=$(echo "$answer" | sed 's/\(\.[^0]\+\)0\+/\1/')
+    answershort=$(echo "$answer" | sed '/\./ s/\.\{0,1\}0\{1,\}$//')
     if [[ $answershort == 99.* ]]; then
         nines=$(echo $answershort | tr -d -C 9 | wc -c | tr -d ' ')
         [[ $nines -eq 1 ]] && ess="" || ess="s"