Percentage

Allocate a prize pool by explicit percentages you define for each place. Unlike the halving tool, every share is under your control: first place might take 40%, second 30%, and so on. The calculator multiplies each percentage by the total and reports both the cash (or point) amounts and the sum of percentages for a sanity check.

Algorithm

For total T and a list of percentages p₁…pₖ, each award is T × pᵢ / 100. The tool also returns the sum of the computed values (rounded to two decimals) and the sum of the percentage inputs. Percentages need not add to 100—useful when you intentionally leave a reserve or over-allocate and want to see the overrun.

When to use it

• Contests with a published payout table (40% / 30% / 20% / 10%)
• Sponsorship budgets where marketing already fixed the percentage ladder
• Comparing alternative tables by changing only the percentage vector while holding T constant

Limitations

Results are linear arithmetic, not odds of winning. Floating-point rounding can leave cent-level differences versus hand spreadsheets. The tool does not enforce sum(p) = 100. It ignores currency conversion, withholding tax, and non-cash prizes. Invalid (non-finite or negative) totals fail.

Example

Pool 1000 with percentages 40, 30, 20, 10 yields awards 400, 300, 200, 100. Reported total value is 1000 and total percentage is 100. Changing the vector to 50, 25, 15, 10 yields 500, 250, 150, 100 on the same pool.

This skill is available over A2A JSON-RPC and REST. When you already know the skill id and export, call execute directly—no discovery step required.

REST example

curl -sS -X POST https://toolplaza.app/api/helpers/execute \
  -H 'Content-Type: application/json' \
  -d '{"skillId":"prizes__percentage","export":"splitPrizePoolByPercentages","args":["Hello"]}'

A2A JSON-RPC example

Send POST https://toolplaza.app/api/a2a with:

{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "message/send",
  "params": {
    "message": {
      "messageId": "uuid",
      "role": "user",
      "parts": [
        {
          "kind": "text",
          "text": "ignored"
        }
      ]
    },
    "metadata": {
      "toolplaza": {
        "skillId": "prizes__percentage",
        "export": "splitPrizePoolByPercentages",
        "args": [
          "Hello"
        ]
      }
    }
  }
}

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