Algebra-1

To find the common ratio (r) of a geometric sequence, we divide each term in the sequence by its preceding term. Let's calculate the ratios:

$$\frac {25m} {4}\div \frac {5m} {2}=\frac {25m} {4}\times \frac {2} {5m}=\frac {50m} {20m}=\frac {5} {2}$$