Cambridge KS3 Mathematics: Fractions, Decimals and Percentages | 剑桥初中数学：分数、小数与百分比

📚 Cambridge KS3 Mathematics: Fractions, Decimals and Percentages | 剑桥初中数学：分数、小数与百分比

In the Cambridge Lower Secondary Mathematics course, fractions, decimals and percentages are treated as connected ways of describing parts of a whole. The exercises in resource p108_2.pdf require you to move flexibly between these three forms, compare their sizes, and use them in calculations. This guide explains each skill with clear examples so that you can answer similar questions accurately.

在剑桥初中数学课程中，分数、小数和百分比被视为描述整体的一部分的三种相互关联的方式。资源 p108_2.pdf 中的练习要求你在三种形式之间灵活转换、比较大小并用于计算。本指南通过清晰的示例逐一讲解每项技能，帮助你准确解答类似问题。

1. The Meaning of Fractions | 分数的意义

A fraction is written as a numerator over a denominator. The denominator tells you how many equal parts the whole is divided into, and the numerator tells you how many of those parts are being considered.

分数写作分子在上、分母在下。分母表示整体被平均分成多少份，分子表示你正在考虑其中的几份。

For example, the fraction 3/5 means 3 parts out of 5 equal parts. It can also be read as the division 3 ÷ 5, which gives the decimal 0.6.

例如，分数 3/5 表示 5 等份中的 3 份。它也可以读作除法 3 ÷ 5，结果是小数 0.6。

A proper fraction has a numerator smaller than its denominator, such as 2/7. An improper fraction has a numerator equal to or greater than its denominator, such as 9/4, and can be written as a mixed number 2¼.

真分数的分子小于分母，如 2/7。假分数的分子大于或等于分母，如 9/4，它可以写成带分数 2¼。

2. Equivalent Fractions and Simplest Form | 等值分数与最简形式

Equivalent fractions look different but represent exactly the same value. You

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