A percent is one part per hundred, so X% of Y equals X × Y ÷ 100. Example: 15% of 200 is 30; 30 is 15% of 200; and going from 200 to 250 is a 25% increase.
How is it calculated?
Percent (%) literally means "per hundred", and every percentage calculation is a variation on that one idea. The three everyday questions: what is X% of Y — multiply and divide by 100, for example when working out a 15% discount on a product; X is what % of Y — divide the part by the whole and multiply by 100, for example to see what share of your salary goes to rent; and the % change from X to Y — divide the difference by the old value and multiply by 100, for example when checking how much a price or salary went up. Pick the mode, enter two numbers, and the calculator answers instantly.
Example: 15% of 200 is 200 × 15 ÷ 100 = 30; 30 out of 200 is (30 ÷ 200) × 100 = 15%; and going from 200 to 250 is (250 − 200) ÷ 200 × 100 = a 25% increase. One thing to watch: percent change is always measured against the starting value — rising from 200 to 250 is +25%, but falling from 250 back to 200 is only −20%, because the base has changed. That is why an equal rise and fall in percent do not return you to where you started.
Frequently asked questions
What is the difference between percentage points and percent change?
A percentage point is the simple difference between two percentages, while percent change is measured relative to the starting value. For example, an interest rate that rises from 4% to 6% is up 2 percentage points — but in relative terms that is a 50% increase, because (6 − 4) ÷ 4 × 100 = 50.
How do I calculate a price after a discount?
Multiply the original price by (100 − discount %) ÷ 100. For example, a 250 ₪ item with a 20% discount: 250 × 80 ÷ 100 = 200 ₪. Quick shortcut: a 20% discount leaves 80% of the price, so just multiply by 0.8.
Is VAT also a percentage calculation?
Yes — VAT is a fixed percent added to the price: price including VAT = pre-VAT price × (1 + VAT rate ÷ 100), and to extract the VAT from a final price you divide by the same factor. For the full calculation with Israel's current rate, Pashut Neto has a dedicated VAT calculator.
This calculation is a general estimate for illustration only. It does not constitute tax, pension, or investment advice, nor a substitute for personal advice from a licensed professional, and should not be relied on for decisions.
