Math & Science Popular
Percentage Calculator
Solve percent of X, percentage increase/decrease, and relative percentage changes.
1What is X% of Y?
%
of=18.00
2X is what percent of Y?
is what % of=
25.0%
3Percentage Increase or Decrease
to=
+50.0%
Summary Results Live
15% of 120:18.00
25 of 100:25.0%
Change (50 → 75):+50.0%
Understanding Percentage Calculator
Instant real-time percentage solver for discounts, sales tax, markups, tips, and mathematical proportion comparisons. All calculations are executed securely within your browser for real-time accuracy and complete data privacy.
Mathematical Formula & Methodology
Percentage formula: Percentage = (Part / Whole) * 100
Frequently Asked Questions About Percentage Calculator
Percentage Increase = [(New Value - Original Value) / Original Value] * 100.