[tex] \frac{15}{100}*24= \frac{360}{100}=3,6 lei [/tex] reducere
[tex] \frac{25}{100}*40= \frac{1000}{100}=10 lei [/tex] reducere
24+40=64lei pretul unui costum
3,6+10= 13,6lei reducere
64lei..................100%
13,6lei................x%
[tex] \frac{64}{13,6}= \frac{100}{x} [/tex]
64x=1360
x=21,25% reducere