Answer:
D
Explanation:
in order to compare all the numbers, we have to express them all in the same form to compare them easily, we will choose to convert all of them to decimal form:
20% = 20/100 = 0.2
1/3 = 0.33333
3.4 x 10⁻¹ = 0.34
-5/2 = -2.5
comparing all these numbers, it is now clear that in decending order:
0.34 > 0.33333 > 0.2 > -2.5
or
3.4 x 10⁻¹ > 1/3 > 20% > -5/2
(Answer D)