Percentage Calculator: Solve Any Percent Problem

Fast, accurate results for everyday calculations.

Percentages are everywhere from seasonal sales and tipping to interest rates and data analysis. While the math seems simple, it can get confusing when you need to calculate a percentage increase, a “percent of” a total, or the original price after a discount. Our Percentage Calculator handles all these scenarios in one place, giving you instant answers for your home, school, or office.

Mastering the Three Types of Percentages

On familyhealthcalc.com, we break down the most frequent ways you’ll use this tool:

1. The Basic Percentage
This is used to find a specific part of a whole.
Scenario: “What is 15% of $80?”
The Math: (15 ÷ 100) × 80 = 12

2. Percentage Change (Increase or Decrease)
This is vital for tracking your budget or investment growth.
Scenario: “Your rent went from $1,200 to $1,350. What is the increase?”
The Math: ((1,350 − 1,200) ÷ 1,200) × 100 = 12.5%

3. Finding the Percentage of a Number
Perfect for school grades or performance reviews.
Scenario: “You got 45 out of 50 on a test. What is your grade?”
The Math: (45 ÷ 50) × 100 = 90%

Real-World Examples for Families

• Shopping: If an item is $60 with a 30% discount, use the “Percentage Decrease” tool to see your $18 savings and $42 final price.
• Nutrition: Checking the “Daily Value” percentages on food labels to ensure your family meets their health goals.
• Work: Calculating your year-end bonus or a cost-of-living adjustment (COLA) based on your current salary.
• Taxes: Estimating the impact of a sales tax increase on a large purchase.