Arithmatical - Banker’s Discount

Important Facts and Formulae
Banker’s Gain (B.G.) = (B.D.) - (T.D.) for the unexpired time.
1. B.D. = S.I. on bill for unexpired time.
2. B.G. = (B.D.) - (T.D.) = S.I. on T.D. = (T.D.)²/P.W.
3. T.D. = √P.W.x B.G

4. B.D = Amount X Rate X Time/100
5. T.D = Amount X Rate X Time / 100 + (Rate X Time)
6. Amount = B.D x T.D. / B.D. - T.D.
7. T.D = B.G x 100 / Rate X Time