ratio

/ˈreɪʃiəʊ/ (bre, ipa) · /ˈreɪʃiəʊ/ (ame, ipa) · /ˈrā-shē-ˌō -(ˌ)shō/ (ame, mw)

ratio — noun

  • ratiosingular
  • ratiosplural

1. A relationship between two numbers or amounts that shows how many times one is l

1.名詞B1
釋義

A relationship between two numbers or amounts that shows how many times one is larger or smaller than the other.

例句

The ratio of boys to girls in Jin's class is three to two.

ratio of X to Y pattern

To make the perfect lemonade, mix water and lemon juice in a 4:1 ratio.

ratio expressed as X:Y

同義詞
  • proportion

    Focuses on the share of a part relative to the whole, often expressed as a percentage

  • rate

    Compares two quantities with different units, such as speed or cost per item

文法句型

ratio of [amount] to [amount]

ratio between [two things]

用法筆記

Typically expressed with a colon (3:1) or the word 'to' (three to one). The preposition pattern 'ratio of A to B' is more common than 'ratio between A and B.'

常見錯誤

❌The ratio of boys to girls is five.
✅The ratio of boys to girls is 5:1.
💡A ratio keeps two numbers separated by a colon; it is not reduced to a single number.

2. In mathematics, the value obtained by dividing one number by another, often writ

2.名詞B2
釋義

In mathematics, the value obtained by dividing one number by another, often written as two numbers with a colon between them or as a fraction.

例句

The ratio of a circle's circumference to its diameter is always about 3.14 to 1.

ratio of ... to ... in math contexts

Shanti simplified the ratio 12:16 to its lowest terms and got 3:4.

simplify a ratio to lowest terms

同義詞
  • quotient

    The result of division; a closer synonym in strict mathematical use but less common in everyday speech

  • fraction

    A way of writing a ratio; fraction emphasizes a part of a whole, while ratio emphasizes comparison

文法句型

ratio of [number] to [number]

simplify a ratio

express as a ratio

用法筆記

Common in geometry and trigonometry (sine, cosine, tangent as ratios of side lengths). In a fraction form like 3/4, the ratio is read as 'three to four.'

常見錯誤

❌Simplify the ratio 12:16 and you get 4.
✅The ratio 12:16 in simplest form is 3:4.
💡Simplifying a ratio keeps two numbers; do not reduce to a single number.