Arithmetic, in the plainest and most concise methods hitherto extant: with new improvements, for dispatch of business, in all the several rules [electronic resource] : As also, fractions, vulgar and decimal, wrought together after a new method, that renders both easy to be understood in their nature and use. The whole perused and approved of by the most eminent accomptants in the several offices of the revenue, viz customs, excise, &c. as the only book of its kind for variety of rules and brevity of work. By George Fisher, accomptant. To which is added, an appendix, containing the construction and use of tables, for calculating questions in compound interest, and annuities of leases in possession or reversion.