Actually Welcome to the Concept of the Ration and Percentage,
To get the Adams rake,
let's calculate 5% of 357 ltrs.
therefore, (5/100)* 357 = 17.85 ltrs
let's subtract the 5 % value from Tapiwa rake,
==> 357 - 17.85 == 339.15
hence the Adams rake is 339.15 ==> round off ==> 339 litres.