Given, the salaries of Sita, Gita and Mita are initially in the ratio 5:6:7, respectively, Let us assume their salaries are 5p,6p and 7p. They get salary hikes of 20%,25% and 20%, respectively. ⇒ Their salaries are 6∕5 * 5p,5∕4*6p and 6∕5*7p⇒6p,7.5p,8.4p Now, Sita and Mita get salary hikes of 40% and 25%, respectively ⇒ Sita's salary =1.4*6p=8.4p and Mita's salary =1.25*8.4p=10.5p Let Gita's salary be ' g ' after hike ⇒3g=8.4p+g+10.5p⇒2g=18.9p⇒g=9.45p ⇒ Hike %=