Răspuns:
Explicație pas cu pas:
Prima zi 2/3 + 15
A ramas 1/3 - 15
40% = 40/100 = 4/10 = 2/5
A doua zi 2/5 (1/3 - 15) = 2/15 - 6
Rest 1/3 - 15 - (2/15 - 6) = 1/3 - 2/15 - 15 + 6 = 5/15 - 2/15 - 9 = 3/15 - 9 = 1/5 - 9 = 27
1/5 = 27+9 = 36
A doua zi: 2/15 - 6 = 2*36 - 6 = 72 - 6 = 66 lei