Answer :

Hi ,

definition :

Ratio:
____

The number of times one quantity contains another quantity

of the same kind is called the ratio of the two quantities.

The ratio a : b represented a / b 

According to the problem ; 

Ratio of 151.1 and 181.9

Ratio = 151.1 / 181.9

         = ( 1511 / 10 ) / ( 1819 / 10 )

         = 1511 / 1819

         = 1511 : 1819

Required ratio = 1511 : 1819

  [ ∵ two numbers are co primes doesn't has common factors ]

i hope this helps you.

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