Answer: The required simplified form of the given ratio is 3 : 4.
Step-by-step explanation: We are given to express the following ratio in simplest form :
[tex]R=21:28~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]
We will be using the following rule :
[tex]a:b=\dfrac{a}{b}.[/tex]
From (i), we get
[tex]R=21:28=\dfrac{21}{28}=\dfrac{7\times3}{7\times4}=\dfra{3}{4}=3:4.[/tex]
Thus, the required simplified form of the given ratio is 3 : 4.
