Question

Fill in the blanks:

$\cdots +\frac{15}{23}=4$

Answer 1

Let the required number be $x$

$\therefore x+\frac{15}{23}=4$

$\Rightarrow x=4-\frac{15}{23}$

$=\frac{4}{1}-\frac{15}{23}$

$=\frac{4\times 23}{1\times 23}-\frac{15}{23}$

$=\frac{92}{23}-\frac{15}{23}$

$=\frac{92-15}{23}$

$=\frac{77}{23}$

Hence, the required number is $\frac{77}{23}.$