Have a question, found a bug, or want to share feedback? We'd love to hear from you. Send us an email and we'll get back to you as soon as we can.
What to include in your message:
If you're reporting a bug or incorrect calculation, please include the numbers you entered and the result you expected. This helps us fix issues quickly.
For general questions about how percentage calculations work, check our calculator page, where each tool includes a plain-English explanation of the math.
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