4 per 5 dibagi 1 per 25 dikurang 5 1/2

[tex] \frac{4}{5} \div \frac{1}{25} - 5 \frac{1}{2} \\ = \frac{4}{5} \times \frac{25}{1} - 5 \frac{1}{2} \\ = 20 - 5 \frac{1}{2} \\ = 19 \frac{2}{2} - 5 \frac{1}{2} \\ = 14 \frac{1}{2} [/tex]