Percentage Lab Blog

Clear explanations of percentage formulas, percent change, discounts and everyday percent math.

Percentage Change Formula: How to Calculate Percent Increase and DecreaseOctober 13, 2026 · One formula for increases and decreases, worked examples, and the mistakes that catch everyone. Percentage Points vs Percent: What's the Difference (and Why It Matters)?October 12, 2026 · Why "up 2 points" and "up 2 percent" are very different statements.

RSS feed

Do the math instantly — percent of, percent change and what percent, free.

Open the free percentage calculator →