Question

which is shorter 4/5 of a millimeter or 3/5 of a meter?

Answer 1

4/5 of a millimeter 

= 4/5  * 1 = 0.80 millimeter

3/5 of a meter.     1meter = 1000millimeter

= 3/5  * 1000 millimeter.    5 into 1000 is 200.

=  3*200 =  600 millimeter

Therefore 4/5 of a millimeter is shorter than 3/5 of a meter.