What’s the difference between a ratio and a proportion?

Question

Alara Mccarthy · Accepted Answer

Step 1
The ratio is comparison of two numbers.
For example, if 25 students, 10 boys and 15 girls are in class, then the ratio of boys to girls is 10 10 to 15 or $\frac{10}{15}$
The ratio of ato bcan be written as the fraction $\frac{a}{b} or a s a \div b$
Step 2
The ratio is used to compare the quantities of two different categories like the ratio of boy to girl in the city.
The ratio is represaented by Colon $⟨)$ sign between the quantitles compared.
Proportion, is denoted by Double Colon $⟨ ⟩$ or Equal to $(=)$ sign, between the ratios under comparison. Proportion is used to find out the quantity of one category over the total, like the proportion of boy out of total people living in the city
Step 3
The ratio is an expression $\frac{a}{b}$ but proportion is an equation $\frac{a}{b} = \frac{c}{d}$

What’s the difference between a ratio and a proportion?

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