A supermarket lets a shopper use both of its offers on the same bill of ₹2000: a coupon giving 15% off, and a 'flat ₹200 off on bills above ₹1500' scheme. The manager may apply them in either order. How much (in ₹) does the shopper save by having the 15% applied before the ₹200 rather than after it?

Percent first: $2000\times 0.85=1700$, then − 200 = ₹1500. Flat first: 2000 − 200 = 1800, then × 0.85 = ₹1530. Taking the percentage first is cheaper by ₹30 — exactly 15% of the ₹200, because that ₹200 escapes the percentage cut when it is removed first. (Two PERCENTAGE discounts can be applied in either order with the same result, and that familiar fact makes ₹0 tempting; a flat rupee amount breaks the symmetry.)