Question

Express in the form n:1 give n as a decimal 21:12

Answer 1

`1.75:1` which is similar to n:1 where
`n=1.75`

Explanation:

Here we have to Express in the form n:1 give n as a decimal 21:12 . Let's find out:

Given ratio as 21:12 . Let's convert it into n:1 , where n is decimal

⇒
`21:12`

⇒
`(21)/(12)`

⇒
`(3(7))/(3(4))`

⇒
`(7)/(4)`

⇒
`((7)/(4))/((4)/(4))` { dividing denominator & numerator by 4 }

⇒
`((7)/(4))/(1)`

⇒
`(1.75)/(1)`

⇒
`1.75:1` which is similar to n:1 where
`n=1.75`