tolang ding 1 sampai 7 saya tidak mengerti

1.
[tex] \frac{3}{5} \times 100(\%) \\ = 60\%[/tex]
2.
[tex] \frac{12}{40} \times 100(\%) \\ =30\%[/tex]
3.
[tex] \frac{21}{70} \times 100(\%) \\ = 30\%[/tex]
4.
[tex] \frac{4}{25} \times 100(\%) \\ = 8\%[/tex]
5.
[tex] \frac{5}{125} \times 100(\%) \\ = 4\%[/tex]
6.
[tex] \frac{5}{8} \times 100(\%) \\ = 62.5\%[/tex]
7.
[tex] \frac{42}{56} \times 100(\%) \\ = 75\%[/tex]