Question

Simplify the ratio 42:28:21

Answer 1

It would be 6:4:3 because you divide each number by a factor they all have in common, which would be 7.

Answer 2

Answer:  The required simplified ratio is 6 : 4 : 3.

Step-by-step explanation:  We are given to simplify the following ratio :

$R=42:28:21.$

We know that

for any two numbers a and b,

$a:b=\dfrac{a}{b}.$

We have

$42:28=\dfrac{42}{28}=\dfrac{7\times6}{7\times4}=\dfrac{6}{4}.$

And,

$28:21=\dfrac{28}{21}=\dfrac{7\times4}{7\times3}=\dfrac{4}{3}.$

Therefore, we get

$42:28:21=6:4:3.$

Thus, the required simplified ratio is 6 : 4 : 3.