Latest posts
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How Much to Tip: A Practical Guide
At a sit-down restaurant in the US, 15% to 20% of the pre-tax bill is the usual range, with 20% the common default for good service. Delivery, haircuts, bars, and hotels each have their own range, and tipping is not expected everywhere. This page covers the amounts, the maths, and the cases where you should…
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Compound Interest Formula, Explained with Examples
Compound interest is interest earned on your interest. Each period, the interest joins the balance, and the next period’s interest is charged on the new, larger balance. Put $2,000 in an account at 6% compounded once a year: after 3 years it is $2,382.03, not the $2,360.00 simple interest would give. The $22.03 gap is…
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How to Calculate Percentage, Step by Step
Take any number, divide it by 100, and you have one percent of it. Everything else below builds on that single move. This page shows how to calculate percentage in every direction: of a number, as a share, as a change, and as a discount. To find a percentage of a number, multiply by the…