By which number should $$2\frac12$$ be multiplied to get $$5\frac25$$​​

Correct option is A

Solution: ​

Let the number be x

Now, 

​$$2\frac12\times x = 5\frac25 \\ \ \\ \frac{5}{2}x =\frac{27}{5} \\ \ \\ x =\frac{27}{5}\times \frac25 =\frac{54}{25} = 2\frac4{25}$$​​