1.
[tex] \frac{26}{100} \times 900 = 234[/tex]
2.
[tex] \frac{20}{100} \times x = 400 \\ 2x = 400 \times 10 = 4000 \\ x = 2000[/tex]
3.
[tex] \frac{x}{100} \times 164 = 123 = > x = 75\%[/tex]
[tex] \frac{x}{100} \times 125 = 105 \\ = > x = 84\%[/tex]
4.
[tex] \frac{5}{100} \times x = 2200 = > x = 44000[/tex]
