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Step-by-step explanation:

C that is 12/25.

others are × by 3

Answer:

12/25 (answer C)

Step-by-step explanation:

as each of the other choices equal to 2/5 after simplification

6/15 (divide 3) = 2/5

18/45 (divide 3) = 6/15 (divide 3) = 2/5