Discounts & Tips: Don't Miscalculate When Shopping or Dining
Discount calculates 'how much saved'; tip calculates 'how much extra' — one subtraction, one addition, but both rely on percentage basics.
Reading discounts
- Original × (1 − discount%) = post-discount price
- Stacked discounts aren't simple addition — multiply sequentially
- Tell whether it's 'minus a fixed amount' or 'percent off'
Splitting the tip
Enter bill, ratio, and party size to get the tip, total, and per-person amount — no more finger-counting at group dinners.
💡 Overseas tips are often 10%–20% — check local custom before calculating.