By what number must the given number be multiplied to increase the number by 25%.

$\frac{3}{4}$ $\frac{5}{4}$ $\frac{2}{5}$ 3

$\frac{5}{4}$

25% = \(\frac{1}{4}\) Old number  :   New number  =  4  :  5 The number should be multiplied by = \(\frac{5}{4}\)