Question

The fish is 25 millimeters long. the guinea pig is 25 centimeters long whats the difference

Answer 1

25 millimeters = 2.5 centimeters

25 centimeters = 250 millimeters

In millimeters:
Fish = 25, pig = 250
Difference 225 mm

In centimeters
Fish = 2.5
Pig = 25
Difference 22.5 cm

Answer 2

Every millimeter is 1/10 of a centimeter, so 1 mm = 0.1 cm and 50 mm = 5 cm. This means that 25 mm can be re-written as 2.5 cm, and we can then find the difference by doing 25 - 2.5 = 22.5 cm. If you were looking for a different type of answer, you can also say that 25 mm is 10 times less than 25 cm.

I hope this helps!