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This example post shows what an article looks like on a Launchpad site. Edit it in the Keystatic admin at /keystatic while developing, or publish new ones from your content platform through the webhook.

Tipping does not need an app. Start from 10 %, double it, halve it or add the two, and you can cover every common tip rate in a few seconds.

Two rates can differ by five percentage points and still represent a fifty percent change. Knowing which one a sentence means stops you from misreading statistics.

A 30 % discount means you pay 70 %. Multiplying by the part you keep is faster and less error-prone than subtracting the part you save.

A percentage of a percentage is just multiplication in disguise. Convert both to decimals, multiply, and convert back.

Adding 20 % tax multiplies by 1.20. Removing it divides by 1.20, not multiplies by 0.80. The asymmetry trips up more people than any other percentage task.

Markup is profit over cost. Margin is profit over price. Same profit, two percentages, and mixing them up quietly erodes pricing.

Percent error is the gap between a measured and an accepted value, as a share of the accepted value. It tells you how good an estimate is, independent of units.

Reverse percentages answer "what was it before?". Divide by the multiplier that was applied, instead of subtracting the percentage.

Growth rates compound, so their average is a geometric mean, not an arithmetic one. The compound annual growth rate is the single rate that would have produced the same end result.

A percentage without its base is a number without a meaning. Ask "percent of what?" and most alarming statistics shrink to their real size.

You do not need exact answers for most everyday percentages. A few tricks get you within a percent or two faster than you can unlock a phone.