1.146g unt, grasimi=146x83/100=121,18g, apa=146x15/100=21,9g
250g unt, grasimi=250x83/100=207,5g, apa=250x15/100=37,5g
2. regula de trei simpla
85......100%
17.........x%
x=17*100/85=20%
3. 4500.........100%
1485..........x%
x=1485*100/4500=33%
4. 15.........100%
11.1.........x%
x=11,1*100/15=74%
5. 2450.........100%
2646............x%
x=2646*100/2450=108% crestere salariala de 8%