Percentage Calculator
Solve common percentage problems instantly. Calculate discounts, tips, test scores, and percentage changes with ease.
1. Find Percentage Value
What is
of
?
Result:
30
2. Find Percentage Rate
is what percent of
?
Result:
25%
3. Percentage Change
What is the change from
to
?
Result:
+50% (Increase)
Understanding Percentages
"Percent" comes from the Latin per centum, meaning "by the hundred". It is a way of expressing a number as a fraction of 100.
Common Formulas
Real World Examples
Discounts
A $50 shirt is roughly 20% off. Formula: 50 × 0.20 = $10 discount. New price: $40.
Tips
A nice meal cost $80. You want to tip 15%. Formula: 80 × 0.15 = $12 tip.