價格：免費
檔案大小：4 MB
版本需求：需要 iOS 6.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：德語, 英語
A useful and intuitive tool for working out those awkward percentages. Perfect for a small business owner or someone revising for their GCSE's it gives you the solution and explains how you get there.
Enjoy,
支援平台：iPhone, iPad