Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 18)

Which of the following statements are true?

A ratio can be expressed with different units.

Ratios are fractions.

Ratios can be simplified by dividing each term by the same factor.

Ratios express a relationship between two or more quantities.

Units should be the same, ratios represent relationships. They are similar to fractions and can be simplified.