a)
[tex] \frac{1}{4} \times 100 = 25[/tex]
b)
[tex] \frac{2}{3} \times 336 = 112 \times 2 = 224[/tex]
c)
[tex] \frac{2}{5} \times 75 = 15 \times 2 = 30[/tex]
d)
[tex] \frac{3}{7} \times 777 = 111 \times 3 = 333[/tex]
e)
[tex] \frac{11}{8} \times 64 = 8 \times 11 = 88[/tex]
f)
[tex] \frac{4}{9} \times 162 = 18 \times 4 = 72[/tex]
g)
[tex] \frac{3}{11} \times 143 = 13 \times 3 = 39[/tex]