If a sum of money (S0) is increased with p percent then decreased with the same percent, the final sum (S2) will be: S2 = S0 * (100+p)/100 * (100-p)/100 A

If a sum of money (S0) is increased with p percent then decreased with the same percent, the final sum (S2) will be: S2 = S0 * (100+p)/100 * (100-p)/100 A plot[1] of this equation will quickly show that as p increases, S2 decreases. [1] http://www.wolframalpha.com/input/?i=%28100%2Bp%29%2F100+*+%28100-q%29%2F100 http://www.wolframalpha.com/input/?i=%28100%2Bp%29%2F100+*+%...