Soo I haven't done ratios in a while.. Anyone get this?

Answer:
A) Yes
B) No
C) Yes
Step-by-step explanation:
A) The ratio of [tex]\frac{1}{5}[/tex] is 1:5. You can simplify ratios, so if you simplify 2:10, it would be 1:5.
B) You can't simplify [tex]\frac{2}{5}[/tex] to anything else and even if you do simplify 2:10, both forms won't match the answer.
C) You can simplify [tex]\frac{4}{20}[/tex] to [tex]\frac{2}{10}[/tex], which then can be simplified to [tex]\frac{1}{5}[/tex]. So it is equivalent to 2:10.