|-------|-------|-------|------| PRIMA ZI
1/4
|----|-----|-----|-----| A DOUA ZI
1/4
|-----|-----|-----| A TREIA ZI
1/3 +72
in a treia zi avea 72:2x3 = 108 lei (din care a cheltuit 1/3= 108:3=36)
in a doua zi avea 108:3x4= 144 lei (din care a chetuit 1/4= 144:4=36)
in prima zi avea 144:3x4=192 lei (din care a cheltuit 1/4= 48 lei)
verificare: 192-48-36-36=72 lei ramasi