Usage and limits
Share totals and change baselines must be positive. Discounts are 0–100%; reverse discounts exclude 100%. Prices cannot be negative; absolute inputs are limited to 10¹⁵. Formulas: base×rate/100; part/total×100; (after−before)/before×100; price×(1−rate/100); sale/(1−rate/100). Display uses up to 12 significant digits, not financial settlement rounding.