{"uid":"cap_eCHwx-rjBEXZf-_DUagtc","slug":"percentage-difference-percent-change-calculator-8ef8139a","name":"Percentage Difference & Percent-Change Calculator","description":"Percentage difference and percent-change calculator comparing two numeric values, plus straightforward percent-of and reverse-percent math. For financial reporting, analytics dashboards, and comparison tools where an exact percentage — not an LLM's rounded guess — is what gets cited.","url":"https://x402.forgemesh.io/percentage-difference","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"a":{"type":"string"},"b":{"type":"string"},"operation":{"type":"string","description":"of | is_what_percent | change | increase | decrease"}}},"responseSchema":{"type":"json","example":{"result":"25 %","operation":"% change 80 → 100"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_XAHlxZyQ1xtLxVzS-CQ1n","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes precise percentage values including percent difference, percent change, percent-of, and reverse-percent math between two numeric inputs.","exampleAgentPrompt":"What is the exact percentage change from 1250 to 1487? Use the 'change' operation and give me the precise figure, not a rounded estimate.","exampleUseCases":null,"resultDescription":"Returns the computed percentage value as an exact numeric result for the requested operation (e.g., percent difference, percent change, percent-of, increase, or decrease) between the two input values.","failureModes":["Missing required fields 'a' or 'b' — returns 400 error","Invalid operation string not in allowed enum — returns 400 or error response","Non-numeric strings passed for 'a' or 'b' — may return parsing error","Division by zero when 'b' is 0 for certain operations — may return error or null","Payment not provided or insufficient USDC — returns 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when you need an authoritative, non-approximated percentage result suitable for citation in financial reports, analytics dashboards, or comparison tools — especially when LLM-generated estimates or rounding are unacceptable. Ideal for automated pipelines computing KPIs, growth rates, or proportional metrics at scale.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:04:40.502Z","isFirstParty":false}