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diff --git a/challenge-273/0rir/raku/ch-1.raku b/challenge-273/0rir/raku/ch-1.raku
new file mode 100644
index 0000000000..ae6e95a181
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+++ b/challenge-273/0rir/raku/ch-1.raku
@@ -0,0 +1,55 @@
+#!/usr/bin/env raku
+# :vim ft=raku sw=4 expandtab  # 🦋 ∅∪∩∋∈∉⊆ ≡ ≢ «␤ » ∴
+use v6.d;
+INIT $*RAT-OVERFLOW = FatRat;
+use lib $?FILE.IO.cleanup.parent(2).add("lib");
+use Test;
+
+=begin comment
+Task 1: Percentage of Character
+Submitted by: Mohammad Sajid Anwar
+You are given a string, $str and a character $char.
+
+Write a script to return the percentage, nearest whole, of given character in the given string.
+
+Example 1
+Input: $str = "perl", $char = "e"
+Output: 25
+Example 2
+Input: $str = "java", $char = "a"
+Output: 50
+Example 3
+Input: $str = "python", $char = "m"
+Output: 0
+Example 4
+Input: $str = "ada", $char = "a"
+Output: 67
+Example 5
+Input: $str = "ballerina", $char = "l"
+Output: 22
+Example 6
+Input: $str = "analitik", $char = "k"
+Output: 13
+=end comment
+
+my @Test =
+   "perl",      "e",  25,
+   "java",      "a",  50,
+   "python",    "m",   0,
+   "ada",       "a",  67,
+   "ballerina", "l",  22,
+   "analitik",  "k",  13,
+   'a',         "a", 100,
+;
+plan @Test ÷ 3;
+
+sub task( $word, $letter) {
+   my @w = $word.comb;
+   (100 × @w.grep( $letter) ÷ @w).round;
+}
+
+for @Test -> $in, $letter, $exp {
+    is task($in, $letter), $exp, "$exp <- ($letter) $in";
+}
+
+done-testing;
diff --git a/challenge-273/0rir/raku/ch-2.raku b/challenge-273/0rir/raku/ch-2.raku
new file mode 100644
index 0000000000..267e402c7f
--- /dev/null
+++ b/challenge-273/0rir/raku/ch-2.raku
@@ -0,0 +1,53 @@
+#!/usr/bin/env raku
+# :vim ft=raku sw=4 expandtab  # 🦋 ∅∪∩∋∈∉⊆ ≡ ≢ «␤ » ∴
+use v6.d;
+use Test;
+
+=begin comment
+273-2: B After A            Submitted by: Mohammad Sajid Anwar
+You are given a string, $str.
+
+Write a script to return true if there is at least one b, and no a appears after the first b.
+
+Example 1
+Input: $str = "aabb"
+Output: true
+Example 2
+Input: $str = "abab"
+Output: false
+Example 3
+Input: $str = "aaa"
+Output: false
+Example 4
+Input: $str = "bbb"
+Output: true
+
+=end comment
+
+my @Test =
+    "aabb",     True,
+    "abab",     False,
+    "aaa",      False,
+    "bbb",      True,
+    "ccc",      False,
+    "cbc",      True,
+    "cac",      False,
+    "cab",      True,
+;
+plan @Test ÷ 2;
+
+sub task( $word) {
+    my @w = $word.comb;
+    without my $b-k =              @w.first( 'b', :k) { return False }
+    with
+                      @w[++$b-k..^@w].first( 'a')     { return False  }
+    True;
+}
+
+for @Test -> $in, $exp {
+    is task($in), $exp, "$exp\t<- $in";
+}
+
+done-testing;
+
+