If the kinetic energy of the particle is increased to16 times its previous value, the percentage change in the de Broglie wavelength of the particle is

If kinetic energy increases by 16 times velocity or momentum increases by 4 times and de-Broglie wavelength decreases by four times 

$\mathrm{so} \mathrm{\lambda } \mathrm{becomes} \frac{\mathrm{\lambda }}{4} \mathrm{decreases} \mathrm{by} 75\%$