Question

Найдите 5процентов от 4целых2десятых

Answer 1

$boxed{bold{4 dfrac{2}{10} = dfrac{4cdot10+2}{10} = dfrac{42}{10}} = 4,2}; \ \ \ boxed{5 % OT dfrac{42}{10} } rightarrow boxed{(4,2:100)cdot 5 = 0,042cdot5 = 0,21} \ \ \ \ boxed{bold{OTBET: 0,21}}}$