Percentage Calculator
Four handy percentage calculation modes. Easy formulas, instant results, clear display.
1 What is X% of Y?
% of
=
?
2 X is what % of Y?
is what % of
? %
3 Percentage Change
From
to
? %
4 Find Original Value
Final value
after
% change =
?
Frequently Asked Questions
What modes are available?
4 modes: (1) What is X% of Y? (2) X is what % of Y? (3) Percentage increase/decrease. (4) Find original value from final value and % change.
Does it support decimals?
Yes — all inputs accept decimal numbers.
Can it handle negative percentages?
Yes — a negative percentage represents a decrease in Mode 3 and Mode 4.
What if I divide by zero?
The tool shows a "Cannot divide by zero" error if the denominator is zero.