The ground of arts : teaching the perfect worke and practice of arithmeticke, both in whole numbers and fractions, after a more easie and exact sort, than hitherto hath bene set forth. Made by M. Robert Record D. in Physicke And now lately diligently corrected and beautified with sundry new rules and necessarie additions: and further endowed with a third parte of rules of practise, abridged into a briefer method than hitherto hath bene published: with diuerse such necessarie rules as are incident to the trade of merchandise. Whereunto are also added diuerse tables and instructions that will bring great profit and delight vnto marchants, gentlemen, & others, as by the contents of this treatise shall appeare. By Iohn Mellis.