2,(5) = 2 + 0.5 = 2.5 = 5/2

8,(16) = 8 + 0.16 = 8.16 = 816/100 = 204/25

4,(2) = 4 + 0.2 = 4.2 = 42/10 = 21/5

7,(13) = 7 + 0.13 = 7.13 = 713/100 = 713/100