Cấu trúc chuẩn:

Intro
Formula
Step-by-step
Examples
Calculator
Common mistakes
FAQ
Related calculators

Tổng:

2500–3000 words

1. Intro (150–200 words)

Mục tiêu:

• chứa keyword chính
• giải thích nhanh vấn đề
• dẫn tới calculator

Ví dụ:

H1: How to Calculate Percentage

Percentages are used everywhere in finance, statistics, shopping, and everyday math. Understanding how to calculate percentages helps you compare values, analyze changes, and interpret data more easily.

In simple terms, a percentage represents a portion of a whole expressed out of 100. Whether you're calculating a discount, measuring growth, or analyzing data, the percentage formula provides a quick way to understand proportions.

In this guide, you'll learn:

• the percentage formula
• step-by-step calculation methods
• percentage increase and decrease
• real examples
• how to use a percentage calculator

2. Formula section (300 words)

Google rất thích phần này.

H2: Percentage Formula

The basic percentage formula is:

Percentage = (Part ÷ Whole) × 100

This formula converts a fraction into a percentage.

Example:

If 30 out of 120 students passed an exam:

(30 ÷ 120) × 100 = 25%

This means 25% of the students passed.

Thêm variations:

percentage increase formula
percentage decrease formula
percentage change formula

3. Step-by-Step Guide (400–500 words)