Math & Numbers
Percentage Calculator
Solve common percentage questions including percentage of a total, value from a percentage, and percentage change
json· JSON resultOpen tool
Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/math-percentage-calculator' \
-H 'Content-Type: application/json' \
-d '{"mode":"percentage-of-total","value":"45","total":"120","percentage":"","originalValue":"","newValue":"","decimalPlaces":2}'API reference
Send a POST request with your inputs as JSON. File parameters require a separate upload first.
Endpoint
HTTP
POST https://api.elysiatools.com/en/api/tools/math-percentage-calculatorParameters
| Name | Type | Required | Description |
|---|---|---|---|
| mode | select | No | — |
| value | text | No | — |
| total | text | No | — |
| percentage | text | No | — |
| originalValue | text | No | — |
| newValue |
MCP integration
Add this tool to your Model Context Protocol server so AI agents can list and call it.
Server configuration
Add this block to your MCP client configuration:
mcp.json
{
"mcpServers": {
"elysiatools-math-percentage-calculator": {
"name": "math-percentage-calculator",
"description": "Solve common percentage questions including percentage of a total, value from a percentage, and percentage change",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=math-percentage-calculator",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}List available tools
After connecting to the SSE endpoint, list the exposed tools:
tools/list
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Call this tool
Invoke the tool by its id, passing arguments built from its parameters:
tools/call
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "math-percentage-calculator",
"arguments": {
"mode": "percentage-of-total",
"value": "45",
"total": "120",
"percentage": "",
"originalValue": "",
"newValue": "",
"decimalPlaces": 2
}
}
}Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).
Questions or issues? Contact [email protected]