Math
Math articles
Guides and examples for solving math calculations with more context.
Math · 4 min read
What percentage is one number of another?
Learn the formula for finding what percentage one value represents out of another, with examples.
Read articleMath · 3 min read
What is percentage increase?
Compare original and new values to understand how much a quantity grew in percentage terms.
Read articleMath · 4 min read
How to calculate percentages without overthinking it
A quick guide to percentage formulas, parts of a total, increases and everyday examples.
Read articleMath · 5 min read
How to calculate grades with percentages
Calculate test percentages and weighted final grades with clear formulas and examples.
Read articleMath · 5 min read
Reverse percentages: how to find the original value
Recover an original value from a final amount after a discount, increase, tax or markup.
Read articleMath · 6 min read
Percentage formulas in Excel and Google Sheets
Use spreadsheet formulas for percentages, discounts, increases and changes without double-counting percent formatting.
Read articleMath · 5 min read
Percentage difference vs. percentage change
Choose the correct formula depending on whether values have a meaningful starting point or are peers being compared.
Read articleMath · 5 min read
How to convert fractions and decimals to percentages
Move between fractions, decimals and percentages with simple operations and familiar equivalences.
Read articleMath · 5 min read
Percent vs. percentage points: what is the difference?
Interpret changes in rates, polls and taxes correctly by separating relative percent change from percentage-point change.
Read articleMath · 4 min read
Percentage decrease: formula and examples
Calculate how much a value fell relative to its original amount and avoid using the wrong baseline.
Read articleMath · 4 min read
How to add a percentage to a number
Increase a number by a percentage using a direct formula for prices, markups, fees and growth.
Read articleMath · 4 min read
How to subtract a percentage from a number
Subtract a percentage to calculate discounts, reductions and lower target values without mixing up the base.
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