计算增长率 / math.percentage_change

使用场景 / Purpose

Math: percentage change. 本技能对提供的参数执行计算，输入输出契约如下。文档例子来自已实现函数的固定验收样例；网页本身不执行代码。

输入字段 / Parameters

字段	类型	要求	约束与说明
`old`	"number"	必填 Required	`{"minimum": -1000000000000.0, "maximum": 1000000000000.0}`
`new`	"number"	必填 Required	`{"minimum": -1000000000000.0, "maximum": 1000000000000.0}`

输入例子 / Example input

{
  "old": 80,
  "new": 100
}

预期输出 / Expected output

25.0

完整输入 JSON Schema

{
  "type": "object",
  "properties": {
    "old": {
      "type": "number",
      "minimum": -1000000000000.0,
      "maximum": 1000000000000.0
    },
    "new": {
      "type": "number",
      "minimum": -1000000000000.0,
      "maximum": 1000000000000.0
    }
  },
  "required": [
    "old",
    "new"
  ],
  "additionalProperties": false,
  "maxProperties": 1000
}

完整输出 JSON Schema

{
  "type": "number",
  "minimum": -1e+100,
  "maximum": 1e+100
}