"d%" meaning in English

{
  "forms": [
    {
      "form": "d%s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "d% (plural d%s)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "d100"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Dice games",
          "orig": "en:Dice games",
          "parents": [
            "Tabletop games",
            "Games",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of d100"
      ],
      "id": "en-d%-en-noun-vUEYlJbR",
      "links": [
        [
          "dice game",
          "dice game"
        ],
        [
          "d100",
          "d100#English"
        ]
      ],
      "raw_glosses": [
        "(dice games) Alternative form of d100"
      ],
      "tags": [
        "alt-of",
        "alternative"
      ],
      "topics": [
        "dice",
        "games"
      ]
    }
  ],
  "word": "d%"
}

{
  "forms": [
    {
      "form": "d%s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "d% (plural d%s)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "d100"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms spelled with %",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Dice games"
      ],
      "glosses": [
        "Alternative form of d100"
      ],
      "links": [
        [
          "dice game",
          "dice game"
        ],
        [
          "d100",
          "d100#English"
        ]
      ],
      "raw_glosses": [
        "(dice games) Alternative form of d100"
      ],
      "tags": [
        "alt-of",
        "alternative"
      ],
      "topics": [
        "dice",
        "games"
      ]
    }
  ],
  "word": "d%"
}