Percentages appear in shop discounts, exam marks, tax add-ons, and business growth. The wording changes, but the algebra stays small.
Three core formulas
- Percent of a number: (Percent ÷ 100) × Whole — e.g. 15% of 2,000 = 300
- X is what percent of Y: (X ÷ Y) × 100 — e.g. 45 marks out of 60 = 75%
- Percentage change: ((New − Old) ÷ Old) × 100 — increase or decrease
Discount vs final price
A 20% discount on NPR 5,000 is NPR 1,000 off → pay NPR 4,000. Stacked discounts (20% then 10%) are not 30% off—apply them in sequence.
Marks and grades
Always confirm whether your school uses obtained ÷ total × 100 per subject or a weighted scheme. Convert letter grades only with your official scale.
Try scenarios in the Percentage Calculator before you commit to a sale price, score target, or growth claim.