Answer :

zoec2
By making each of these a decimal, it's easier to see which are bigger or smaller

2.1, 2 2/5, 2 1/2, 2.6, 2.95

2 2/5 = 2.4
2 1/2 = 2.5
2 2/5 = 2 + 0,4 = 2,4
2 1/2 = 2 + 0,5 = 2,5

So, order from the least to the greatest.

2.1 ; 2 2/5 ; 2 1/2; 2.6 ; 2.95

Hope I helped!