Can you please match the number and explain thank you your saving a grade

Answer:
3/5
Step-by-step explanation:
put into fraction form: 21/35
21/35 (divide by 7/7)
3/5
Answer:
We just have to make the ratio into a fraction and simplify:
[tex]21:35=\frac{21}{35}=\frac{3}{5}[/tex]
[tex]12:15=\frac{12}{15} =\frac{4}{5}[/tex]
[tex]8:20=\frac{8}{20}=\frac{2}{5}[/tex]
[tex]2:10=\frac{2}{10} =\frac{1}{5}[/tex]