Course of Raku / Advanced / Operators / User-defined operators / Exercises / Percent-of operator

Solution: Percent-of operator

Here is a possible solution to the task.

Code

sub infix:<percent-of>($p, $whole) {
    $whole * $p / 100
}

say 20 percent-of 150;

🦋 You can find the source code in the file percent-of-operator.raku.

Output

30

Comments

1. The operator takes the percentage $p as its left operand and the whole amount $whole as its right operand.

2. Multiplying $whole by $p and dividing by 100 gives the requested part: 150 * 20 / 100 is 30.

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