81,24 -4\5 - 20%=...

81,24-4/5-20persen
81,24-0,8-0,2
0,24

[tex] - 81.24 = \frac{2.031}{25} \\ - \frac{4}{5} \\ 20\% = \frac{1}{5} \\ \\ \frac{2.031}{25} - \frac{4}{5} - \frac{1}{5} \\ = \frac{2.031 - 5 \times 4 - 5 \times 1}{25} \\ = \frac{2.031 - 20 - 5}{25} \\ = \frac{2.006}{25} \\ = 80 \frac{6}{25} \\ = 80.24[/tex]
Maaf Kalau Salah