Guides, tips, and explainers to help you understand the numbers behind everyday decisions — from loan interest to BMI, and beyond.
Learn how to compute ratios step by step. Covers simplifying ratios, equivalent ratios, ratio to fraction, ratio to percentage, dividing quantities, and worked examples.
Read Article →Learn how to compute the area of any shape step by step. Covers square, rectangle, triangle, circle, trapezoid, parallelogram, and more with formulas, worked examples, and a free calculator.
Learn how to compute your General Weighted Average (GWA) in the Philippines step by step. Covers the formula, unit system, grade conversion, Latin honors, and a free GWA calculator.
Learn how to compute mean, median, and mode step by step. Includes formulas, worked examples, when to use each measure, and a free calculator.
Learn how to calculate standard deviation step by step. Covers population vs sample standard deviation, variance, the formula, worked examples, and a free calculator.
Learn how to compute income tax in the Philippines step by step. Covers TRAIN Law tax brackets, taxable income, exemptions, withholding tax, and worked examples for 2024–2026.
Learn how to compute the percentage of a number step by step. Includes formula, worked examples, reverse percentage, percentage change, and a free calculator.
Learn how to compute permutations step by step. Covers the nPr formula, factorial, permutations with and without repetition, worked examples, and a free calculator.
Learn how to compute BMI step by step using the metric and imperial formula. Includes BMI categories, limitations, worked examples, and a free BMI calculator.
Learn how to compute 13th month pay step by step. Includes formula, examples, exemptions, tax rules, and a free calculator. Updated for 2026.
Learn how to compute your electric consumption and estimate your monthly bill. Includes formula, worked examples, appliance wattage guide, and energy-saving tips.
Compound interest is called the eighth wonder of the world. Learn how it works, see real examples of savings growth over 10, 20, and 30 years, and why starting early matters so much.
BMI is one of the most used health metrics — but also one of the most debated. Learn how it
Ever wonder why your early loan payments barely reduce your balance? That
V = I × R. Three letters, one equation, and the foundation of all electronics. Learn what voltage, current, and resistance mean and how they relate in real circuits.
Both molarity and molality measure concentration, but they
Most people set savings goals and abandon them within 3 months. The difference between those who succeed isn