Order from least to greatest: 12, 25, 34\frac{1}{2},\; \frac{2}{5},\; \frac{3}{4}21,52,43.
25<12<34\frac{2}{5} < \frac{1}{2} < \frac{3}{4}52<21<43
12<25<34\frac{1}{2} < \frac{2}{5} < \frac{3}{4}21<52<43
34<12<25\frac{3}{4} < \frac{1}{2} < \frac{2}{5}43<21<52
25<34<12\frac{2}{5} < \frac{3}{4} < \frac{1}{2}52<43<21