Kak nonor 11 tolong yaa

luas tiap petak
[tex] \frac{4}{5} \div 2 = \frac{4}{5} \times \frac{1}{2} = \frac{4}{10} \: {hm}^{2} [/tex]
lebar petak sawah
[tex] \frac{4}{10} \div \frac{4}{5} = \frac{4}{10} \times \frac{5}{4} = \frac{20}{40} \\ \\ \frac{20}{40} = \frac{1}{2} \: {hm} = 0.5 \: hm [/tex]