3. a)
[tex] \frac{20}{100} \times 70 = \frac{1400}{100} = 14[/tex]
b)
[tex] \frac{14}{100} \times 250 = \frac{3500}{100} = 35[/tex]
c)
[tex] \frac{34}{100} \times 2700 = \frac{91800}{100} = 918[/tex]
d)
[tex] \frac{110}{100} \times 80 = \frac{8800}{100} = 88[/tex]
4.
[tex] \frac{30}{100} \times 70 = \frac{2100}{100} = 21[/tex]
[tex] \frac{25}{100} \times 40 = \frac{1000}{100} = 10[/tex]
[tex]21 + 10 = 31[/tex]
