Percentage Calculator
Calculate percentages, increases, decreases, and more
Basic Percentage Calculator
What is X% of Y?
%
of
=
{{ basic.result1 || '0' }}
X is what % of Y?
is
of
{{ basic.result2 || '0' }}
%
X is Y% of what?
is
%
of
{{ basic.result3 || '0' }}
Percentage Change Calculator
{{ change.result > 0 ? 'Increase' : change.result < 0 ? 'Decrease' : 'No Change' }}
{{ Math.abs(change.result) }}%
Difference: {{ change.difference }}
{{ change.original }} → {{ change.new }}
Percentage Of Calculator
%
{{ of.percentage }}% of {{ of.value }} = {{ of.result }}
Decimal:
{{ of.decimal }}
Fraction:
{{ of.fraction }}
Remaining:
{{ of.remaining }} ({{ 100 - of.percentage }}%)
Discount & Markup Calculator
%
{{ discount.type === 'discount' ? 'After Discount' : 'After Markup' }}
Original Price:
${{ discount.originalPrice }}
{{ discount.type === 'discount' ? 'Discount Amount:' : 'Markup Amount:' }}
{{ discount.type === 'discount' ? '-' : '+' }}${{ discount.result.amount }}
Final Price:
${{ discount.result.finalPrice }}
You save ${{ discount.result.amount }}!
Quick Reference
Common Percentages
10% = 0.1 = 1/10
25% = 0.25 = 1/4
50% = 0.5 = 1/2
75% = 0.75 = 3/4
100% = 1.0 = 1/1
Formulas
X% of Y = (X/100) × Y
X is Y% of Z = (X/Z) × 100
% Change = ((New-Old)/Old) × 100
Discount = Original × (Rate/100)
Tips
15% tip ≈ Move decimal left, add half
20% tip = Move decimal left, double
Sales tax varies by location
Interest compounds over time