Simplifying ratio 12:21 gives you 4:7
20 over 35 reduced to its lowest terms is 4/7
14 over 25 reduced to lowest terms = 14/25 (it is already in simplest form).
2/5 in its lowest term
6 over 8 reduced to its lowest terms is 3/4 or 0.75
8/245 is already at its lowest (reduced) form.
It is already reduced to its lowest terms.
0.37 reduced to a fraction in lowest form is 37/100
7/16 is already reduced to it's lowest form - it can't be reduced further.
0.63 in a fraction reduced to its lowest term is 63/100
0.005 in a fraction reduced to its lowest term is 1/200
That's the lowest it can be reduced already. 6/13.
1620
20 over 35 reduced to its lowest terms is 4/7
14 over 26 reduced to its lowest term is 7/13
375 over 1000 reduced to its lowest form is 3/8
72 over 132 reduced to lowest terms is 6/11
5 fifteenths (5/15) reduced to lowest terms is 1/3