Question

3.8 is what in percent 1.9375 is what in percent ​

Answer 1

we know 1.9375 is the 100%, what is 3.8 off of it in percentage?

$\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 1.9375&100\\ 3.8&x \end{array}\implies \cfrac{1.9375}{3.8}=\cfrac{100}{x}\implies 1.9375x=380 \\\\\\ x = \cfrac{380}{1.9375}\implies x \approx 196.129$

let's notice that 3.8 is about twice as much as 1.9375.