Use worked examples to understand percentages, averages, grades, ratios, and practical conversions. Try the percentage calculator, GPA calculator, or unit converter. Grade and GPA rules depend on the selected scale and your institution.
Multiply a price by a discount, then by a tax rate, or flip the order – mathematically, it makes no difference at all. Multiplication doesn’t care what order you do it in. So why do receipts sometimes…
“Unemployment rose from 4% to 5%” and “unemployment rose by 25%” describe the exact same change, and they land completely differently. The first is a percentage point difference – simple subtraction. …
US gallon vs UK gallon explained: 3.785 vs 4.546 liters, why the sizes split in 1824, and how the gap changes your beer pints and MPG figures.
Learn how to calculate percentage of marks with one formula, plus worked examples for 12th class with 6 subjects and CGPA to percentage conversion.
Convert your percentage to GPA on the US 4.0 scale with a bracket table built for Indian and Pakistani marks, plus WES guidance and a free calculator.
GPA is a credit-weighted average, so late grades move it slowly. How to calculate the GPA you would need, what is achievable, and where to focus your effort.
Not every sale saves you money. How to check a was price, compare unit prices, and reverse-calculate a claimed discount to see if a deal is real.
Percentage change is (new minus old) divided by old. How to build the formula in Excel and Google Sheets, format it, and avoid the classic errors.
How to round numbers: if the next digit is 5 or more round up, otherwise round down. Covers decimal places, significant figures, and the exactly-5 case.
How to calculate percentage increase and decrease: multiply by (1 + decimal) or (1 – decimal). Worked examples, plus the increase-then-decrease trap.
