History of Hindu Mathematics: A Source Book v1.c8.s13.22

v1.c8.s13.22

"Multiply the principal (p) by its time (t₁) and divide by the other time (t₂) (placing the result) at two places. Multiply the first of these by the mixture (A). Add to this the square of half the other. Take the squareroot of this (sum). From the result subtract half the other. This will be the interest (x) on the principal."²