In this sequence there are actually two sequences. 1 sequence for the numerators and one sequence for the denominators. The following transformation applies to the sequence for the denominators : -8

This creates the following sequence: [-8, -16, -24, -32, -40, -48, -56]

The following transformation applies to the sequence for the numerators: +9

This creates the following sequence: [11, 20, 29, 38, 47, 56, 65]

Take a good look at how to rewrite the fractions in the series to recognize the pattern.

For example, -4/5 can be rewritten as -16/20