Answer:
4/9 has the greatest value.
Step-by-step explanation:
To know which of the given rational numbers has the greatest value, first rewrite them as:
4.9% = 0.049
0.42
-.83 = -0.83
4/9 = 0.444
With these, see that
0.444 > 0.43 > 0.049 > -0.83
Therefore, 4/9 has the greatest value.